Add `execute_sql_rds.sh` script to run SQL using RDS Data API #596

Job	Run time
API Lint, Format & Tests	2m 44s
Run API Vulnerability Scans / build-and-cache	1m 35s
Run API Vulnerability Scans / Hadolint Scan	8s
Run API Vulnerability Scans / Anchore Scan	48s
Run API Vulnerability Scans / Dockle Scan	50s
Run API Vulnerability Scans / Trivy Scan	59s
	7m 4s

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