Fix Issue 24109 - [REG2.103] 'need this' when invoking outer method from inner method

[RazvanN7]

A slip up on my side when implementing the haveSameThis function. It needs to check the case for inheriting classes last because the check on line 1218 used to eagerly return false before the nested check had a chance to return true.

cc @kinke @WalterBright

[dlang-bot]

Thanks for your pull request and interest in making D better, @RazvanN7! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

• My PR is fully covered with tests (you can see the coverage diff by visiting the details link of the codecov check)
• My PR is as minimal as possible (smaller, focused PRs are easier to review than big ones)
• I have provided a detailed rationale explaining my changes
• New or modified functions have Ddoc comments (with Params: and Returns:)

Please see CONTRIBUTING.md for more information.

---

If you have addressed all reviews or aren't sure how to proceed, don't hesitate to ping us with a simple comment.

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	24109	regression	[REG2.103] 'need this' when invoking outer method from inner method

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "stable + dmd#15577"

[kinke]

Thanks, seems to make sense to me, but I'm not really familiar with this stuff and how the logic looked like before your PR introducing that haveSameThis.