fix: fix and optimize search for Course Notification Preference model on django admin #25587

Job	Run time
lms-1(py=3.11,dj=pinned,mongo=7.0)	13m 1s
lms-2(py=3.11,dj=pinned,mongo=7.0)	13m 34s
lms-3(py=3.11,dj=pinned,mongo=7.0)	18m 59s
lms-4(py=3.11,dj=pinned,mongo=7.0)	22m 52s
lms-5(py=3.11,dj=pinned,mongo=7.0)	11m 50s
lms-6(py=3.11,dj=pinned,mongo=7.0)	19m 14s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	15m 55s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	18m 29s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	10m 52s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 35s
cms-1(py=3.11,dj=pinned,mongo=7.0)	5m 5s
cms-2(py=3.11,dj=pinned,mongo=7.0)	18m 42s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	11m 34s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 40s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 1s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 3s
compile-warnings-report	11s
Unit tests successful	4s
coverage (3.11)	1m 51s
	3h 32m 32s

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