Fix 22915 - Print the type of invalid foreach aggregates

[MoonlightSentinel]

Mentioning the type alongside the expressions is helpful when the
error isn't obvious, e.g. when the code didn't derefence a pointer.

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	22915	minor	Errors for invalid foreach aggregates should print the type

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#13877"