BUG: The ok_ flag was not being updated in the regExpCxx::set() method

This is to avoid overset interpolation in the calculation of the stencil
itself since this triggers a loop.

- records execution and wallclock times to postProcessing/
  which can be more convenient than parsing a log file.

This will use a random-number generator to select for
each cell the processor. Useful for testing parallel/non-parallel
consistent behaviour.

- simplify faceZone selection in surfaceMeshExtract

- uniformFixedValue was relocated from lib OpenFOAM

- adjust naming of quaternion 'rotationSequence' to be 'eulerOrder'
  to reflect its purpose.

- provide rotation matrices directly for these rotation orders in
  coordinateRotations::euler for case in which the rotation tensor
  is required but not a quaternion.

Modified revert of commit 6c6f777b.

- The "alphaContactAngleFvPatchScalarField" occurs in several
  places in the code base:

    - as abstract class for two-phase properties
    - in various multiphase solvers

  To resolve potential linking conflicts, renamed the abstract class
  as "alphaContactAngleTwoPhaseFvPatchScalarField" instead.

  This permits potential linking of two-phase and multi-phase
  libraries without symbol conflicts and has no effect on concrete
  uses of two-phase alphaContactAngle boudary conditions.

Feature porting mingw

See merge request OpenFOAM-plus!258

- support move insert/set and emplace insertion.

  These adjustments can be used for improved memory efficiency, and
  allow hash tables of non-copyable objects (eg, std::unique_ptr).

- extend special HashTable output treatment to include pointer-like
  objects such as autoPtr and unique_ptr.

ENH: HashTable::at() method with checking. Fatal if entry does not exist.

Feature dynamic code

See merge request OpenFOAM-plus!255

- can be used for outputing sampled surfaces in x3d format for direct
  import in other rendering tools.

Reacting heterogeneous cloud

See merge request OpenFOAM-plus!242

All remote contributions to interpolation stencils now
get added as 'processor' type lduInterfaces. This guarantees
a consistent matrix, e.g. initial residual is normalised to 1.

Second change is the normalisation of the interpolation discretisation
which uses the diagonal from the unmodified equation. This helps
GAMG.

- this corresponds more closely to the expected behaviour of a
  patch-average value being independent of the local face
  discretization

Feature reflective solar load

See merge request OpenFOAM-plus!243

- for codedFunctionObject and CodedSource the main code snippets
  were not included in the SHA1 calculation, which meant that many
  changes would not be noticed and no new library would be compiled.

  As a workaround, a dummy 'code' entry could be used solely for the
  purposes of generating a SHA1, but this is easily forgotten.

  We now allow tracking of the dynamicCodeContext for the coded
  objects and append to the SHA1 hasher with specific entries.
  This should solve the previous misbehaviour.

  We additionally add information about the ordering of the code
  sections. Suppose we have a coded function object (all code
  segments are optional) with the following:

      codeExecute "";
      codeWrite   #{ Info<< "Called\n"; #};

  which we subsequently change to this:

      codeExecute #{ Info<< "Called\n"; #};
      codeWrite   "";

  If the code strings are simply concatenated together, the SHA1 hashes
  will be identical. We thus 'salt' with their semantic locations,
  choosing tags that are unlikely to occur within the code strings
  themselves.

- simplify the coded templates with constexpr for the SHA1sum
  information.

- Correct the CodedSource to use 'codeConstrain' instead of
  'codeSetValue' for consistency with the underlying functions.

- localize some functionality, std::array for digest internals.
  Additional append sub-string methods, pass-through write of digest
  etc.

- only apply component-wise transformCoupleField for non-scalar types