CCM-12059: Improve Eventpub Lambda Build - Build only when changed #484

Job	Run time
Set CI/CD metadata	5s
Commit stage / Check English usage	10s
Commit stage / Check file format	7s
Commit stage / Check Markdown format	3s
Commit stage / Scan dependencies	41s
Commit stage / Detect Terraform Changes	6s
Commit stage / Check TODO usage	3s
Commit stage / Scan secrets	6s
Commit stage / Count lines of code	7s
Commit stage / Lint Terraform	3s
Commit stage / Run terraform-docs	9s
Commit stage / Trivy Scan	2m 25s
Test stage	0s
Build stage	0s
Acceptance stage	0s
Publish stage	0s
	4m 5s

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