Fix Issue 19419 - [REG2.080.1] @disabled this() will print wrong error if calling non-default constructor with wrong parameters

[RazvanN7]

Introduced by [1]. The check for disabled should only be made for NewDeclarations, for all other functions that is being taken care of before.

[1] #8042

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	19419	regression	[REG2.080.1] @disabled this() will print wrong error if calling non-default constructor with wrong parameters

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub fetch digger
dub run digger -- build "stable + dmd#8994"

[RazvanN7]

Looks like it's the same old issue with stable and C++ namespace; unrelated to this PR.

[thewilsonator]

Hmm, bummer.

[RazvanN7]

We can force push it, just like: #8951

[thewilsonator]

OK (I'm going to sleep soon).