Make the example app use the new migration tooling #3009

Job	Run time
setup / Get and cache Dart dependencies	33s
setup / Compile sqlite3 for tests (ubuntu-latest)	6s
setup / Compile sqlite3 for tests (macos-latest)	8s
setup / Compile sqlite3 for tests (windows-latest)	13s
sqlparser	39s
Documentation	3m 5s
drift_dev	34s
drift package	37s
Integration tests for migration tooling	1m 10s
Integration tests	2m 51s
test_flutter (3.24)	1m 49s
Drift web unit tests, dart2wasm, ${{ matrix.browser }}	0s
drift_web_ddc	0s
Web integration tests	0s
	11m 45s

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