babelfish-for-postgresql / babelfish_extensions / 20717258406

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ANTLR crash at exitSecurity_statement during 'GRANT/REVOKE CONNECT ON SCHEMA' (#4363)

This commit fixes crash happening at exitSecurity_statement when encountering invalid CONNECT permission in GRANT/REVOKE CONNECT ON SCHEMA statements. Added validation checks in tsqlIface.cpp to detect CONNECT permissions in both GRANT and REVOKE operations on schema objects. It throws appropriate syntax error with message when invalid CONNECT permission is encountered.

Task: BABEL-6032
Signed-off-by: Harsh Lunagariya <lunharsh@amazon.com>

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