Fix Issue 22766 - copyEmplace does not work with copy constructor and @disable this()

[RazvanN7]

No description provided.

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	22766	enhancement	copyEmplace does not work with copy constructor and @disable this()

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 + druntime#3799"

[dkorpel]

Looks good, just a D Style thing.