Don't use 'Candidate is' when there is more than one alias function overload

[ntrel]

Depends on #14617 for now.

[dlang-bot]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	23459	trivial	Don't use 'Candidate is' when there is more than one alias function overload

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#14618"

[thewilsonator]

Dependant PR merged