feat: use jammy repositories to install mongo for testing and unpin lxml and xmlsec. #30170

Job	Run time
collect-and-verify	4m 35s
lms-1(py=3.11,dj=pinned,mongo=7.0)	9m 44s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 34s
lms-3(py=3.11,dj=pinned,mongo=7.0)	16m 38s
lms-4(py=3.11,dj=pinned,mongo=7.0)	20m 18s
lms-5(py=3.11,dj=pinned,mongo=7.0)	10m 51s
lms-6(py=3.11,dj=pinned,mongo=7.0)	15m 44s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	11m 6s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	15m 52s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 26s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 26s
cms-1(py=3.11,dj=pinned,mongo=7.0)	5m 7s
cms-2(py=3.11,dj=pinned,mongo=7.0)	13m 2s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 42s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 35s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 13s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 59s
Unit tests successful	2s
compile-warnings-report	9s
coverage (3.11)	1m 34s
merge-artifacts	6s
	3h 4m 43s

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