Makefile testing targets improvements

[rakanalh]

Changes

• Github CI: Prevent building the binary for tests twice
  • Added a step for invoking make build-test in github checks.yml
• Github CI: Now invokes make test-ci and make coverage-ci using the prebuilt binary
• make test and make coverage are for local use where the binary gets built as a dependency to the make target
• Add two new make targets, to pick and choose which tests to run locally:
  • make -C bin/citrea mock-e2e
  • make -C bin/citrea bitcoin-e2e
• Reorganize tests into mock-e2e and bitcoin-e2e
  • Add common stuff in bin/citrea/tests/common

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.6%. Comparing base (1a9c200) to head (9c3b15b).
Report is 4 commits behind head on nightly.

Additional details and impacted files

see 17 files with indirect coverage changes

[jfldde]

I am not sure about this PR e2e and bitcoin renaming, makes it confusing.
Maybe e2e/bitcoin e2e/mock would better represent it