Disable failing test on macOS in EntityComponentManager_TEST (backport #3113)

[mergify]

🦟 Bug fix

Part of #3089

Summary

This tests have been failing on macOS consistently. I have been able to reproduce the failures locally, but I have not been able to understand why they are failing. Let's disable them for now to unblock other PRs.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers
• Was GenAI used to generate this PR? If so, make sure to add "Generated-by" to your commits. (See this policy for more info.)
  Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by and Generated-by messages.

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This is an automatic backport of pull request #3113 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 0f2210f has failed:

On branch mergify/bp/ign-gazebo6/pr-3113
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You are currently cherry-picking commit 0f2210f8.
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	both modified:   src/EntityComponentManager_TEST.cc

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