fix: use a single 'provider_type' key for storing discussion provider type in course #33038

Job	Run time
collect-and-verify	2m 54s
lms-1(py=3.11,dj=pinned,mongo=7.0)	9m 58s
lms-2(py=3.11,dj=pinned,mongo=7.0)	10m 34s
lms-3(py=3.11,dj=pinned,mongo=7.0)	13m 46s
lms-4(py=3.11,dj=pinned,mongo=7.0)	18m 37s
lms-5(py=3.11,dj=pinned,mongo=7.0)	9m 50s
lms-6(py=3.11,dj=pinned,mongo=7.0)	14m 16s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	10m 53s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	13m 26s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 7s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 15s
cms-1(py=3.11,dj=pinned,mongo=7.0)	3m 15s
cms-2(py=3.11,dj=pinned,mongo=7.0)	11m 20s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 7s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	4m 10s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	7m 19s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 12s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 44s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	7m 22s
Unit tests successful	2s
compile-warnings-report	12s
coverage (3.11)	1m 38s
merge-artifacts	7s
	2h 55m 4s

Provide feedback