d: Merge upstream dmd, druntime 82a5d2a7c4, phobos dbc09d823

D front-end changes:

	- Import latest fixes from dmd v2.110.0-beta.1.
	- Added traits `getBitfieldOffset' and `getBitfieldWidth'.
	- Added trait `isCOMClass' to detect if a type is a COM class.
	- Added `-fpreview=safer` which enables safety checking on
	  unattributed functions.

D runtime changes:

	- Import latest fixes from druntime v2.110.0-beta.1.

Phobos changes:

	- Import latest fixes from phobos v2.110.0-beta.1.
	- Added `fromHexString' and `fromHexStringAsRange' functions to
	  `std.digest'.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 82a5d2a7c4.
	* d-lang.cc (d_handle_option): Handle new option `-fpreview=safer'.
	* expr.cc (ExprVisitor::NewExp): Remove gcc_unreachable for the
	generation of `_d_newThrowable'.
	* lang.opt: Add -fpreview=safer.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime 82a5d2a7c4.
	* libdruntime/Makefile.am (DRUNTIME_DSOURCES): Add
	core/internal/gc/blkcache.d, core/internal/gc/blockmeta.d.
	* libdruntime/Makefile.in: Regenerate.
	* src/MERGE: Merge upstream phobos dbc09d823.