Use SubProcess start time in Group Wait() method

[bodo-hugo-barwich]

To address the issues:

• Unexpected execution times #49
• Failed test 'Runner Usage Message is printed' #48
• failing test verbose output #47
• test_runner.t fails on Perl 5.38.0 GNU/Linux #39
• Process::SubProcess::Group::Wait() Method fails with Timeout #20

The Process::SubProcess objects will not expose the Start Time of the process which is then used to update the Process::SubProcess::Group Start Time so that the Execution Time will be more reliable in Process::SubProcess::Group.

Also the test_runner.t test will include verbose output and the parsing check will look for more flexible formatting of the help message

Additionally the new methods and more methods in Process::SubProcess have documentation now as the on-going effort to enhance the documentation as
documented at:
Automated Documentation

[bodo-hugo-barwich]

The Automated Tests show that the changes do not affect the operativity and keep the expected behaviour.

The development needs to be released to the the smoke test results.