Add `Migrator::with_migrations()` constructor (#4020) #1586

Job	Run time
Check	45s
Integration Test (macOS-latest)	42s
Functional Test (MySQL)	53s
Integration Test (ubuntu-latest)	34s
Functional Test (SQLite)	38s
Integration Test (macOS-13)	57s
Build (macOS-13)	1m 9s
Build (ubuntu-latest)	45s
Build (macOS-latest)	57s
Functional Test (PostgreSQL)	49s
Build (windows-latest)	3m 49s
	11m 58s

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