fix Issue 13757 - [CTFE] extern(C) alias declaration does not work in CTFE
fix Issue 13756 - [AA] Allow ref const index on foreach AA iteration
Merge pull request #4152 from 9rnsr/fix13756

Issue 13756 - [AA] Allow ref const index on foreach AA iteration
Merge pull request #4153 from 9rnsr/fix13757

Issue 13757 - [CTFE] extern(C) alias declaration does not work in CTFE
Preparation for the issue 13701 - Hijack object.dup(aa) call to emulate it in CTFE
fix Issue 13701 - Associative array values ignore immutability
Merge pull request #4154 from 9rnsr/ctfe_aa_dup

Preparation for the issue 13701 - Hijack object.dup(aa) call to emulate it in CTFE
Merge pull request #4148 from 9rnsr/fix13701

[REG2.061] Issue 13701 - Associative array values ignore immutability
fix Issue 13669 - [CTFE] Destructor call on static array variable is not yet supported in CTFE
fix Issue 13661 - static array init does not call destructors