Make integration_spec randomizable

[ellnix]

Pull Request

Related issue

Fixes #115

PR checklist

Please check if your PR fulfills the following requirements:

• [X] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• [X] Have you read the contributing guidelines?
• [X] Have you made sure that the title is accurate and descriptive of the changes?

Notes (please read)

• The behavior and methodology of the tests was left untouched wherever possible
• Issue #115 instructs to create a PR for each fixed file but spec/integration_spec.rb was the only file with any issues, so this PR should fix the whole suite
• Issue #115 does not fully instruct whether randomized testing should actually be enabled in the repo, so I left it disabled
• I ran the suite ~40 times after fixing everything (probably another ~40 times while fixing it) so there could still be issues I did not spot. My rationale was that the tests should ideally be refactored before (or while) going through them line by line and trying to spot any more errors.

[codecov[bot]]

Codecov Report

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

Comparison is base (fc40e59) 88.73% compared to head (8547b03) 89.04%.

:exclamation: Current head 8547b03 differs from pull request most recent head 8b3afd3. Consider uploading reports for the commit 8b3afd3 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #296 +/- ## ========================================== + Coverage 88.73% 89.04% +0.30% ========================================== Files 10 10 Lines 657 657 ========================================== + Hits 583 585 +2 + Misses 74 72 -2 ``` [see 1 file with indirect coverage changes](https://app.codecov.io/gh/meilisearch/meilisearch-rails/pull/296/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=meilisearch)

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[ellnix]

@brunoocasali Rebased, and I think I addressed all of the feedback.

[ellnix]

bors merge

[meili-bors[bot]]

Build failed:

• integration-tests (Rails 6.1 with Ruby 3.0)

[ellnix]

bors merge

[meili-bors[bot]]

Build succeeded:

• integration-tests (Rails 6.1 with Ruby 2.7)
• integration-tests (Rails 6.1 with Ruby 3.0)
• integration-tests (Rails 6.1 with Ruby 3.1)
• integration-tests (Rails 7 with Ruby 2.7)
• integration-tests (Rails 7 with Ruby 3.0)
• integration-tests (Rails 7 with Ruby 3.1)
• linter-check
• smoke-test