fix: make `lis_person_contact_email_primary` matching case-insensitive #53

Job	Run time
collect-and-verify (3.11, pinned)	3m 20s
lms-1(py=3.11,dj=pinned,mongo=7.0)	12m 31s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 26s
lms-3(py=3.11,dj=pinned,mongo=7.0)	17m 34s
lms-4(py=3.11,dj=pinned,mongo=7.0)	22m 15s
lms-5(py=3.11,dj=pinned,mongo=7.0)	10m 40s
lms-6(py=3.11,dj=pinned,mongo=7.0)	17m 50s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	14m 11s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	16m 26s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 42s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 15s
cms-1(py=3.11,dj=pinned,mongo=7.0)	3m 30s
cms-2(py=3.11,dj=pinned,mongo=7.0)	17m 31s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 57s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 2s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	5m 58s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 35s
	3h 9m 43s

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