Fix potential crash when a descriptor set is destroyed but not unbound (

google#8215)

Merge branch 'rc/1.54.5' into release

Merge branch 'rc/1.54.4' into release

Merge branch 'rc/1.54.3' into release

Merge branch 'rc/1.54.2' into release

Merge branch 'rc/1.54.1' into release

Merge branch 'rc/1.54.0' into release

Merge branch 'rc/1.53.5' into release

Merge branch 'rc/1.53.4' into release

Merge branch 'rc/1.53.3' into release