Merge branch 'spp-diffblobs' into 'master'

SPP - Scan committed diffs instead of entire file

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/158984



Merged-by: Ethan Urie <eurie@gitlab.com>
Approved-by: Dominic Bauer <dbauer@gitlab.com>
Approved-by: Ethan Urie <eurie@gitlab.com>
Reviewed-by: Ethan Urie <eurie@gitlab.com>
Reviewed-by: Serena Fang <sfang@gitlab.com>
Reviewed-by: Vishwa Bhat <vbhat@gitlab.com>
Reviewed-by: Ahmed Hemdan <ahemdan@gitlab.com>
Co-authored-by: Serena Fang <sfang@gitlab.com>
Co-authored-by: Ahmed Hemdan <ahemdan@gitlab.com>