chore(embedded/sql): Add support for core pg_catalog tables (pg_class… #4119

Job	Run time
build-and-test (ubuntu-latest, 1.17)	56s
build-and-test (ubuntu-latest, 1.18, true)	3m 33s
build-and-test (ubuntu-latest, 1.18, true)	4m 26s
Coverage	6m 39s
build-and-test (ubuntu-latest, 1.19, true)	3m 29s
build-and-test (windows-latest, 1.18, true, true)	1m 58s
build-and-test (macos-latest, 1.18, true)	1m 6s
Run Gosec Security Scanner	1m 42s
performance-test-suite-detect-runners	1s
Coverage	0s
Performance Test Suite (github-ubuntu-latest)	3m 27s
	27m 17s

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