HBASE-29873 Filter out mvninstall in github actions check and improve…

[Apache9]

… the job summary for unit check

[Apache9]

We need to add maven plugin if we want to specify build tool as maven, and we have this in maven plugin

function maven_initialize
{
  # we need to do this before docker does it as root

  maven_add_install compile
  maven_add_install mvnsite 
  maven_add_install unit

So there is no way for us to avoid running mvninstall for unit check...

Let's focus on improving the test output summary.