build: Remove newrelic from dependencies; note system deps in README #30596

Job	Run time
collect-and-verify	4m 18s
lms-1(py=3.11,dj=pinned,mongo=7.0)	9m 54s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 16s
lms-3(py=3.11,dj=pinned,mongo=7.0)	14m 35s
lms-4(py=3.11,dj=pinned,mongo=7.0)	20m 4s
lms-5(py=3.11,dj=pinned,mongo=7.0)	11m 2s
lms-6(py=3.11,dj=pinned,mongo=7.0)	15m 35s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	11m 5s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	14m 34s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 39s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 0s
cms-1(py=3.11,dj=pinned,mongo=7.0)	5m 1s
cms-2(py=3.11,dj=pinned,mongo=7.0)	12m 38s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 33s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 52s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 52s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 40s
Unit tests successful	2s
coverage (3.11)	1m 41s
compile-warnings-report	12s
merge-artifacts	6s
	3h 0m 39s

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