d: Merge upstream dmd 65a3da148c, phobos fc06c514a.

D front-end changes:

    - Import latest bug fixes from dmd v2.106.0-beta.1.

Phobos changes:

    - Import latest bug fixes from phobos v2.106.0-beta.1.
    - `std.range.primitives.isForwardRange' now takes an optional
      element type.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 65a3da148c.

libphobos/ChangeLog:

	* src/MERGE: Merge upstream phobos fc06c514a.