Introduce SEMANTIC_RELEASE_DISABLED variable
Problem to solve
After we add Semantic-Release to our AutoDevops and CI Templates, users may want to disable the tool.
Intended users
User experience goal
As a developer, I want my AutoDevops template to NOT auto-increment versions and generate release notes using Semantic-Release.
Proposal
Users can disable the job if it's not necessary. We introduce SEMANTIC_RELEASE_DISABLED
variable and if the variable is present, the job doesn't appear.