fix(targets): Make sink assertion compatible with stream maps (#2589) #232

Job	Run time
External Tests	28s
Test on 3.8 (tests) / ubuntu-latest / SQLAlchemy: 2	48s
Test on 3.9 (tests) / ubuntu-latest / SQLAlchemy: 2	45s
Test on 3.10 (tests) / ubuntu-latest / SQLAlchemy: 2	58s
Test on 3.11 (tests) / ubuntu-latest / SQLAlchemy: 2	59s
Test on 3.12 (tests) / ubuntu-latest / SQLAlchemy: 2	49s
Test on 3.8 (tests) / macos-latest / SQLAlchemy: 2	1m 34s
Test on 3.9 (tests) / macos-latest / SQLAlchemy: 2	45s
Test on 3.10 (tests) / macos-latest / SQLAlchemy: 2	38s
Test on 3.11 (tests) / macos-latest / SQLAlchemy: 2	41s
Test on 3.12 (tests) / macos-latest / SQLAlchemy: 2	41s
Test on 3.8 (tests) / windows-latest / SQLAlchemy: 2	2m 21s
Test on 3.9 (tests) / windows-latest / SQLAlchemy: 2	2m 11s
Test on 3.10 (tests) / windows-latest / SQLAlchemy: 2	1m 18s
Test on 3.11 (tests) / windows-latest / SQLAlchemy: 2	1m 43s
Test on 3.12 (tests) / windows-latest / SQLAlchemy: 2	1m 42s
Test on 3.12 (tests) / ubuntu-latest / SQLAlchemy: 1	45s
Test on 3.12 (doctest) / ubuntu-latest / SQLAlchemy: 2	29s
Test on 3.12 (mypy) / ubuntu-latest / SQLAlchemy: 2	1m 0s
Test on 3.12 (deps) / ubuntu-latest / SQLAlchemy: 2	28s
Coverage	25s
	21m 28s

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