[TST] Add tests for CheckCollections, make test collection setup more flexible

[eculver]

Note for reviewers

Sorry in advance for extra diff noise. I realized that the tests here are harder to work with than they should be (which is probably why we have so many gaps in the tests) so I refactored some things to move the needle in the right direction. I will follow up with more testing changes.

Summary

This adds a test for the CheckCollections method. This would have caught the issue fixed in #4899.

Along the way, I discovered how these tests need some love, so I started down this path by introducing a new daotest package that provides testing helpers for creating Collection values that are easier to configure. Instead of having to potentially debug all the tests that use dao.CreateTestCollection, I defined a "shim" that can be used as a stop-gap so that I can change the signature of this dao.CreateTestCollection without potentially derailing the original goal which was just to add some missing test coverage.

• Improvements & Bug fixes
  • Added test coverage for CheckCollections service endpoint
• New functionality
  • Added daotest package and NewTestCollection helper with builder/options methods for more configurability

Test plan

All the tests are passing.

Documentation Changes

N/A

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[propel-code-bot]

Add CheckCollections Test and Refactor Test Collection Setup Helpers

This PR adds explicit test coverage for the CheckCollections gRPC method, which would have caught a previously resolved bug (#4899). To enable more flexible and maintainable test setup, it introduces a new daotest package with configurable test collection builders, refactors test helpers to take dbmodel.Collection objects instead of parameter lists, and updates all affected test code and utilities to use the new helpers. No production code is affected; all changes are limited to test code and test utility infrastructure.

Key Changes:
• Added a comprehensive test for the CheckCollections endpoint in collection_service_test.go.
• Introduced go/pkg/sysdb/metastore/db/dao/daotest/collection.go with NewTestCollection and builder-style option helpers.
• Replaced all direct calls to CreateTestCollection with the new daotest.NewDefaultTestCollection or NewTestCollection helper throughout integration and unit test files.
• Refactored CreateTestCollection to accept a dbmodel.Collection struct rather than many parameters, improving flexibility for future test coverage.
• Cleaned up test utilities and clarified TODOs for follow-up refactoring.

Affected Areas:
• Testing utilities for collection creation (dao/test_utils.go, dao/daotest/collection.go)
• Collection-related integration and unit tests in sysdb/grpc, dao, and segment tests

This summary was automatically generated by @propel-code-bot