Check building of every commit in CI

[karczex]

Check building of every pull request's commit in CI

Rationale

Improve overall quality of project, and make it easier to bisect.

Description

• Add gha build
• Add ccache to docker image used by gha step (one image is enough)
• Build every commit in PR, fail build in case of build failures

API Changes

No

Implementation details

pmemkv_validate_commits() {
	commits=$(git log origin/master..HEAD --pretty=format:"%h")
	for sha in $(echo ${commits} | tac); do
		git checkout $sha; make clean && make -j$(nproc)
	done
}