feat: sqlserver / mssql support #1078

Job	Run time
Run test with H2	3m 7s
Run test with H2	3m 7s
Checks	3m 34s
Checks	3m 34s
Docs	1m 50s
Docs	1m 50s
Run test with Postgres	3m 30s
Run test with Postgres	3m 30s
Run test with Postgres and JSONB payload	1m 41s
Run test with Postgres and JSONB payload	1m 41s
Run test with SQL Server	3m 52s
Run test with SQL Server	3m 56s
Run tests with Yugabyte	4m 21s
Run tests with Yugabyte	4m 21s
	43m 54s

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