feat: switching to celery native backoff for cert awarding (#35009) #171

Job	Run time
collect-and-verify	5m 42s
lms-1(py=3.11,dj=pinned,mongo=7.0)	13m 31s
lms-2(py=3.11,dj=pinned,mongo=7.0)	13m 52s
lms-3(py=3.11,dj=pinned,mongo=7.0)	19m 25s
lms-4(py=3.11,dj=pinned,mongo=7.0)	23m 54s
lms-5(py=3.11,dj=pinned,mongo=7.0)	12m 25s
lms-6(py=3.11,dj=pinned,mongo=7.0)	18m 58s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	15m 58s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	18m 35s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	10m 21s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 30s
cms-1(py=3.11,dj=pinned,mongo=7.0)	5m 34s
cms-2(py=3.11,dj=pinned,mongo=7.0)	21m 12s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	12m 26s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 46s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	7m 58s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 11s
Unit tests successful	2s
compile-warnings-report	13s
coverage	0s
merge-artifacts	6s
	3h 42m 39s

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