Feature/parareal pfasst redesign

Issue/feature addressed

This is a redesign of the Parareal and PFASST subclasses.

Proposed solution

Implementation

This MR has been split into:

• Update driver class and subclasses to use default destructor (see !1624 (merged))
• Add additional SDC test to the CI (see !1621 (merged))
• Move SVVVarDiffCoeff from UnsteadySystem.h to UnsteadyViscousBurgers.cpp (see !1626 (closed))
• Fix typo in user-guide and fix bug for parallel-in-time FieldConvert (see !1645 (merged))
• Add member function in MPI communicator to check if time-parallel is enable (see !1647 (merged))
• Update default global system solver parameters for paralell-in-time (see !1649 (merged))
• Update AssemblyMap to reduce verbosity when using parallel-in-time (see !1651 (merged))
• Add safety check for FinTime parameter for parallel-in-time (see !1652 (merged))

Tests

• solvers/ADRSolver/Tests/PFASSTDriverUnsteadyAdvection2D.tst
• solvers/ADRSolver/Tests/PararealDriverUnsteadyAdvection2D.tst

Suggested reviewers

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Notes

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Checklist

• Functions and classes, or changes to them, are documented.
• [ ] User guide/documentation is updated.
• Changelog is updated.
• Suitable tests added for new functionality.
• Contributed code is correctly formatted. (See the contributing guidelines).
• [ ] License added to any new files.
• No extraneous files have been added (e.g. compiler output or test data files).