Remove the build when code is merged in master

It takes more and more time to run the CIs and having duplicated jobs do not help:

I propose to run pipelines only when a tag is created. In addition to this and in order to have the master always linted we could use a tool like husky as a git precommit hook: https://www.danilucaci.com/blog/how-to-lint-and-test-code-using-git-pre-commit-hooks