Extract workflows dependencies

• Move build dependencies moved to .github/workflows/build-dependencies.txt shared among workflows.

• Change ubuntu-latest -> ubuntu-20.04 to avoid unexpected runner environment updates in zloop workflow.

• Change ubuntu-20.04 -> ubuntu-latest to track changes in runner environment in checkstyle workflow.

• Kernel buffer is flushed before ZTS invocation to avoid storing the same data after each test case run.

• make is invoked with consistent set of options to reduce clutter in logs.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #13037