Fix Issue 24135 - Eponymous template member overloads not shown as call candidates

[ntrel]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	24135	enhancement	Eponymous template member overloads not shown as call candidates

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 "master + dmd#15572"

[ntrel]

@maxhaton Ping

[RazvanN7]

I would also add a test with two eponymous templates that are in the same overload set but have different template parameters + an invalid call, just to make sure that both eponymous candidates are printed correctly.

Other than that, please rebase this and I will merge it.