test: diversify default DID providers in tests to increase coverage

[mirceanis]

What is being changed

This is only a change in the tests to cover a wider range of scenarios by using different default DID providers between the integration test suites.

Quality

Check all that apply:

• [X] I want these changes to be integrated
• [X] I successfully ran pnpm i, pnpm build, pnpm test, pnpm test:browser locally.
• [X] I allow my PR to be updated by the reviewers (to speed up the review process).
• [ ] I added unit tests.
• [X] I added integration tests.

Details

No functionality should be changed in this PR.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (72e2ee3) 84.85% compared to head (51a4a34) 84.85%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## next #1216 +/- ## ======================================= Coverage 84.85% 84.85% ======================================= Files 167 167 Lines 18056 18065 +9 Branches 2027 2028 +1 ======================================= + Hits 15321 15329 +8 - Misses 2735 2736 +1 ``` | [Files Changed](https://app.codecov.io/gh/uport-project/veramo/pull/1216?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uport-project) | Coverage Δ | | |---|---|---| | [packages/credential-ld/src/ld-suite-loader.ts](https://app.codecov.io/gh/uport-project/veramo/pull/1216?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uport-project#diff-cGFja2FnZXMvY3JlZGVudGlhbC1sZC9zcmMvbGQtc3VpdGUtbG9hZGVyLnRz) | `92.50% <100.00%> (+2.17%)` | :arrow_up: | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/uport-project/veramo/pull/1216/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uport-project)

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.