Create advanced CI flow

[rpanic]

We want to seperate expensive tests for cheap tests to maximize test cost efficiency. For example, we don't want tests that compile and prove circuits to run on every push.

Following seperation should be made:

• test: Executes all unit tests with no external dependencies
• test:integration: Executes all previous tests plus tests that require external dependencies
• test:full: Executes all tests, including tests that compile and prove circuits

test should be executed on every push, test:integration on merging PRs, test:full on merging PRs, but have to be triggered manually.

[maht0rz]

I'd suggest we extend this with CI cross-integration to starter kit, we'd have to create an e2e test for starter kit too.
Let's not forget splitting the tests into proofs enabled / disabled too.