feat: SQLTarget connector instance shared with sinks #3795

Job	Run time
External Tests	0s
Test on 3.7 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 39s
Test on 3.8 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 8s
Test on 3.9 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 26s
Test on 3.10 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 27s
Test on 3.11 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 22s
Test on 3.7 (tests) / macos-latest / SQLAlchemy: 2.*	2m 3s
Test on 3.8 (tests) / macos-latest / SQLAlchemy: 2.*	2m 13s
Test on 3.9 (tests) / macos-latest / SQLAlchemy: 2.*	2m 10s
Test on 3.10 (tests) / macos-latest / SQLAlchemy: 2.*	2m 20s
Test on 3.11 (tests) / macos-latest / SQLAlchemy: 2.*	1m 57s
Test on 3.7 (tests) / windows-latest / SQLAlchemy: 2.*	2m 53s
Test on 3.8 (tests) / windows-latest / SQLAlchemy: 2.*	3m 12s
Test on 3.9 (tests) / windows-latest / SQLAlchemy: 2.*	2m 50s
Test on 3.10 (tests) / windows-latest / SQLAlchemy: 2.*	3m 11s
Test on 3.11 (tests) / windows-latest / SQLAlchemy: 2.*	2m 37s
Test on 3.11 (tests) / ubuntu-latest / SQLAlchemy: 1.*	1m 7s
Test on 3.10 (doctest) / ubuntu-latest / SQLAlchemy: 2.*	38s
Test on 3.8 (mypy) / ubuntu-latest / SQLAlchemy: 2.*	1m 5s
Coverage	43s
	36m 1s

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