fix: Delete tags_count from LibraryXBlockMetadata [FC-0062] #29613

Job	Run time
collect-and-verify	3m 58s
lms-1(py=3.11,dj=pinned,mongo=7.0)	9m 58s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 55s
lms-3(py=3.11,dj=pinned,mongo=7.0)	14m 45s
lms-4(py=3.11,dj=pinned,mongo=7.0)	19m 44s
lms-5(py=3.11,dj=pinned,mongo=7.0)	11m 12s
lms-6(py=3.11,dj=pinned,mongo=7.0)	15m 28s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	10m 49s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	14m 24s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 8s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 58s
cms-1(py=3.11,dj=pinned,mongo=7.0)	4m 51s
cms-2(py=3.11,dj=pinned,mongo=7.0)	12m 20s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 40s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 47s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 32s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 40s
compile-warnings-report	13s
coverage (3.11)	1m 40s
Unit tests successful	4s
merge-artifacts	9s
	2h 59m 15s

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