Fix Issue 20751 - SortedRange with ref predicate parameters fails

[MoonlightSentinel]

isTwoWayCompatible should accept functions with ref parameters.

[dlang-bot]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	20751	normal	SortedRange with ref predicate parameters fails

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 + phobos#7457"