More efficient test loading and add option to include tests in packaging

[isc-dchui]

Description

• Resolves Provide a way to suppress load of unit tests #870
• Resolves Let's have an option to not package unit-tests #843
• When running tests, if you specify a suite or class using the -D flags, instead of loading and compiling all tests, will just load and compile the relevant tests.
• Added option to include tests in package/publish either with a CLI -include-tests flag or adding a <IncludeTests>1</IncludeTests> element in module.xml

Testing

Added a new integration test.
Ran the tests both with and without the -D flags

Checklist

• This branch has the latest changes from the main branch rebased or merged.
• Changelog entry added.
• Unit (zpm test -only) and integration tests (zpm verify -only) pass.
• Style matches the style guide in the contributing guide.
• Documentation has been/will be updated
  • Source controlled docs, e.g. README.md, should be included in this PR and Wiki changes should be made after this PR is merged (add an extra issue for this if needed)
• Pull request correctly renders in the "Preview" tab.