refactor!: remove `ENABLE_HOME_PAGE_COURSE_API_V2` feature toggle #33531

Job	Run time
lms-1(py=3.11,dj=pinned,mongo=7.0)	8m 36s
collect-and-verify	2m 57s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 30s
lms-3(py=3.11,dj=pinned,mongo=7.0)	13m 29s
lms-4(py=3.11,dj=pinned,mongo=7.0)	20m 11s
lms-5(py=3.11,dj=pinned,mongo=7.0)	9m 51s
lms-6(py=3.11,dj=pinned,mongo=7.0)	14m 26s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	10m 5s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	13m 32s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 17s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 50s
cms-1(py=3.11,dj=pinned,mongo=7.0)	3m 26s
cms-2(py=3.11,dj=pinned,mongo=7.0)	12m 9s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 6s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	4m 3s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	7m 28s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 17s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 41s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 4s
Unit tests successful	2s
coverage (3.11)	1m 36s
compile-warnings-report	8s
merge-artifacts	6s
	2h 57m 50s

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