chore: use Contains or ErrorContains with testify

[mmorel-35]

Description of the changes

• use Contains or ErrorContains with testify
• remove useless Error check before ErrorContains check

How was this change tested?

• CI

Checklist

• [x] I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• [x] I have signed all commits
• [ ] I have added unit tests for the new functionality
• [ ] I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.49%. Comparing base (1378e91) to head (eafd0e1). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #6161 +/- ## ======================================= Coverage 96.49% 96.49% ======================================= Files 354 354 Lines 20126 20126 ======================================= Hits 19420 19420 Misses 522 522 Partials 184 184 ``` | [Flag](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | Coverage Δ | | |---|---|---| | [badger_v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `8.31% <ø> (ø)` | | | [badger_v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.67% <ø> (ø)` | | | [cassandra-4.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `14.39% <ø> (ø)` | | | [cassandra-4.x-v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.61% <ø> (ø)` | | | [cassandra-5.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `14.39% <ø> (ø)` | | | [cassandra-5.x-v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.61% <ø> (ø)` | | | [elasticsearch-6.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `18.59% <ø> (-0.01%)` | :arrow_down: | | [elasticsearch-7.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `18.68% <ø> (+<0.01%)` | :arrow_up: | | [elasticsearch-8.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `18.85% <ø> (ø)` | | | [elasticsearch-8.x-v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.67% <ø> (+0.01%)` | :arrow_up: | | [grpc_v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `9.48% <ø> (ø)` | | | [grpc_v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `6.99% <ø> (-0.01%)` | :arrow_down: | | [kafka-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `8.88% <ø> (ø)` | | | [kafka-v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.67% <ø> (?)` | | | [memory_v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.67% <ø> (ø)` | | | [opensearch-1.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `18.72% <ø> (ø)` | | | [opensearch-2.x-v1](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `18.72% <ø> (ø)` | | | [opensearch-2.x-v2](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `1.67% <ø> (ø)` | | | [tailsampling-processor](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `0.46% <ø> (ø)` | | | [unittests](https://app.codecov.io/gh/jaegertracing/jaeger/pull/6161/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jaegertracing) | `95.40% <ø> (ø)` | | Flags with carried forward coverage won't be shown. 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