feat: SQLTarget connector instance shared with sinks #3757

Job	Run time
Test on 3.7 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 33s
Test on 3.8 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 8s
Test on 3.9 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 8s
Test on 3.10 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 22s
Test on 3.11 (tests) / ubuntu-latest / SQLAlchemy: 2.*	1m 36s
Test on 3.7 (tests) / macos-latest / SQLAlchemy: 2.*	2m 22s
Test on 3.8 (tests) / macos-latest / SQLAlchemy: 2.*	1m 57s
Test on 3.9 (tests) / macos-latest / SQLAlchemy: 2.*	2m 8s
Test on 3.10 (tests) / macos-latest / SQLAlchemy: 2.*	2m 15s
Test on 3.11 (tests) / macos-latest / SQLAlchemy: 2.*	2m 6s
Test on 3.7 (tests) / windows-latest / SQLAlchemy: 2.*	2m 41s
Test on 3.8 (tests) / windows-latest / SQLAlchemy: 2.*	3m 7s
Test on 3.9 (tests) / windows-latest / SQLAlchemy: 2.*	2m 45s
Test on 3.10 (tests) / windows-latest / SQLAlchemy: 2.*	3m 43s
Test on 3.11 (tests) / windows-latest / SQLAlchemy: 2.*	3m 23s
Test on 3.11 (tests) / ubuntu-latest / SQLAlchemy: 1.*	1m 35s
Test on 3.10 (doctest) / ubuntu-latest / SQLAlchemy: 2.*	39s
Test on 3.8 (mypy) / ubuntu-latest / SQLAlchemy: 2.*	46s
External Tests	0s
Coverage	0s
	36m 14s

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