test: add test case for query.or and relation field

[ricmatsui]

New Pull Request Checklist

• [x] I am not disclosing a vulnerability.
• [x] I am creating this PR in reference to an issue.

Issue Description

Related issue: https://github.com/parse-community/parse-server/issues/7828

Adding relation constraints to a compound query for example: Query.or(...).equalTo('relationField', ...) does not work and no results are returned. This is because reduceInRelation only reduces the relations in the child queries and not the parent query.

Approach

Adding a similar test as the existing or queries on pointer and relation fields test

TODOs before merging

• [x] Add tests
• [x] A changelog entry is created automatically using the pull request title (do not manually add a changelog entry)

[parse-github-assistant[bot]]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[ricmatsui]

Superseded by https://github.com/parse-community/parse-server/pull/8203