* stable-6.4:
Add verification in GcKeepFilesTest that bitmaps are generated
Express the explicit intention of creating bitmaps in GC
GC: prune all packfiles after the loosen phase
Prepare 5.13.3-SNAPSHOT builds
JGit v5.13.2.202306221912-r
Change-Id: Idb6dd6160e023673e3650653a15f6b1c540de96e