fix: discussion xblock not compatible with forum v2 #34321

Job	Run time
collect-and-verify	4m 32s
lms-1(py=3.11,dj=pinned,mongo=7.0)	10m 7s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 35s
lms-3(py=3.11,dj=pinned,mongo=7.0)	15m 37s
lms-4(py=3.11,dj=pinned,mongo=7.0)	19m 41s
lms-5(py=3.11,dj=pinned,mongo=7.0)	11m 1s
lms-6(py=3.11,dj=pinned,mongo=7.0)	16m 39s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	11m 20s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	14m 48s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 52s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 40s
cms-1(py=3.11,dj=pinned,mongo=7.0)	4m 55s
cms-2(py=3.11,dj=pinned,mongo=7.0)	12m 25s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 46s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 42s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 6s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	11m 47s
Unit tests successful	2s
compile-warnings-report	19s
coverage	0s
merge-artifacts	15s
	3h 6m 9s

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