fix: update macOS image to latest and simplify colima start command #1094

Job	Run time
run_ci (ubuntu-24.04, 3.11, xqueue)	2m 6s
run_ci (ubuntu-24.04, 3.11, discovery+lms+forum)	19m 58s
run_ci (ubuntu-24.04, 3.11, edx_notes_api+lms)	17m 12s
run_ci (ubuntu-24.04, 3.11, registrar+lms)	17m 49s
run_ci (ubuntu-24.04, 3.11, ecommerce+lms)	21m 43s
run_ci (ubuntu-24.04, 3.11, credentials+lms)	17m 52s
run_ci (ubuntu-24.04, 3.11, designer+lms)	18m 10s
run_ci (ubuntu-24.04, 3.11, analyticsapi+insights+lms)	19m 48s
run_ci (ubuntu-24.04, 3.11, enterprise-subsidy+enterprise-catalog+enterprise-access+lms)	24m 2s
run_ci (ubuntu-24.04, 3.11, license-manager+lms)	18m 29s
run_ci (ubuntu-24.04, 3.11, edx-exams+lms)	16m 3s
	3h 13m 12s

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