Improve Pre-Commit Time

As of now the complete build time has reached ~24 hours, which makes tracking Jira with root level changes very tough.

Even at module level, it is on the higher side, kind of 6 hours or more, which is typically equivalent to 1 working day hours:

Some areas to explore:

• Enable Parallel-Test profile for the modules which don't have it.
• Explore improvements in the area of our Test setup, increase memory, number of threads, or some parallel executions?
• Remove the modules or atleast disable the test suites of modules which are no longer being used or maintained (Separate Mail Chain is there for this)
• Spin Two Pre-Commit jobs rather than 1 and split some task between them, kind of one for Java-11 build & Javadoc, Checkstyle and related stuff.
• Figure out & remove irrelevant or similar tests.
• Improve existing tests, Like reusing MiniDfsClusters or so, rather than a bunch of test spinning one for themselves.
• If possible, if there are multiple modules to be tested, run those modules test in parallel (Exploratory: may lead to OOM)