Restore inferred association class with the same modularized name

[justinko]

Fixes #51938

Motivation / Background

#51721 was a nice change, but it removed some existing behavior.

Detail

This change restores the ability for the inferred association class to be the same modularized name.

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Unrelated changes should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• Tests are added or updated if you fix a bug or add a feature.
• CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature. Minor bug fixes and documentation changes should not be included.

[joshuay03]

My apologies for the breaking change, this looks good to me 👍🏽 Thanks for getting a PR up!

[tagliala]

Hello, this commit is fixing an issue on Rails 7.2 that I'm not confident to present at the moment

The issue was introduced in: #51721 329260cc0f

It is present on 7.2.0 and 7-2-stable

Is this PR going to be backported to 7-2-stable branch?

[rafaelfranca]

Backported

[tagliala]

Thanks, just as confirmation specs now passa against 7-2-stable