Release v5.15.3

What's Changed

Backport to staging branch for 5.15.3 by @nimrod-becker in #7988
BACKPORT | stage_5.15.3 | Master keys encryption gaps by @romayalon in #7992
Backport | stage 5.15.3 by @romayalon in #8001
NC | Backport to stage_5.15.3 by @romayalon in #8004
[5.15] Bump version to 5.15.3 by @liranmauda in #8007
Backport | stage 5.15.3 by @romayalon in #8019
Backport | stage_5.15.3 by @romayalon in #8029
Backporing Staging branch of 5.15.3 into 5.15 by @nimrod-becker in #8030
Backport PR #8020 to 5.15 by @guymguym in #8031
[Backport 5.15] [NC | NSFS | Glacier] filter out failed recalls by @tangledbytes in #8085

Full Changelog: v5.15.2...v5.15.3