chore: add success email as last step of treasury generation #936

Job	Run time
Configure AWS Credentials / OIDC Auth	3m 9s
Build deployment artifacts / Build API Docker image	0s
Build deployment artifacts / Build API Lambda function zip artifacts	4m 28s
Build deployment artifacts / Build Python Lambda function zip artifacts	3m 18s
Build deployment artifacts / Build RedwoodJS console Docker image	5m 15s
Build deployment artifacts / Build website deployment artifact	4m 37s
qa / Prepare for QA	4m 5s
qa / Lint python	3m 9s
qa / Test python code	4m 42s
qa / Lint terraform	3m 13s
qa / Test client-side code	4m 15s
qa / Test api-side code	4m 48s
qa / Lint JavaScript	4m 16s
Plan Terraform / Validate and plan terraform	32s
Publish Terraform Plan / Publish Terraform Plan	9s
Publish QA Results / Publish QA Results	3m 6s
	53m 2s

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