d: Merge upstream dmd, druntime 4574d1728d, phobos d7e79f024.

d: Merge upstream dmd, druntime 4574d1728d, phobos d7e79f024.

D front-end changes:

	- Import dmd v2.105.0.
	- Catch clause must take only `const' or mutable exceptions.
	- Creating a `scope' class instance with a non-scope constructor
	  is now `@system' only with `-fpreview=dip1000'.
	- Global `const' variables can no longer be initialized from a
	  non-shared static constructor

D runtime changes:

	- Import druntime v2.105.0.

Phobos changes:

	- Import phobos v2.105.0.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 4574d1728d.
	* dmd/VERSION: Bump version to v2.105.0.
	* d-diagnostic.cc (verror): Remove.
	(verrorSupplemental): Remove.
	(vwarning): Remove.
	(vwarningSupplemental): Remove.
	(vdeprecation): Remove.
	(vdeprecationSupplemental): Remove.
	(vmessage): Remove.
	(vtip): Remove.
	(verrorReport): New function.
	(verrorReportSupplemental): New function.
	* d-lang.cc (d_parse_file): Update for new front-end interface.
	* decl.cc (d_mangle_decl): Update for new front-end interface.
	* intrinsics.cc (maybe_set_intrinsic): Update for new front-end
	interface.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime 4574d1728d.
	* src/MERGE: Merge upstream phobos d7e79f024.