ENH: Moving electric sources mapped from external meshes

Problem

As of the current state of OpenFOAM, the following capabilities are not available:

• The ability to dynamically update cell selections in fvOptions through input dictionary updates.
• The absence of support in fvOptions for handling moving selections, such as moving points.
• The inability to map static fields from external sources for further processing, for instance, when dealing with moving static electric-source fields within an electric field being simulated.

Solution

• The cellSetOption (hence, all fvOptions derived from the cellSetOption) received three new optional input:
  • movingPoints: Use cells containing a given set of moving points.
  • mesh: Select cells based on a given secondary mesh.
  • updateSelection: Flag to enable selection updates.
• New templated fvOption to constrain values of given fields with a source field from an external mesh: <Type>MapFieldConstraint.
• A new hook to electricPotential function object to accomodate internal fvOption constraints.

Verification

• (Heuristic) Test cases:moving-electric-potential.zip (Prior to the review changes)

Risks

• No change in existing input/output.

Metadata

• linux64ClangDPInt32Opt (clang13)
• linux64GccDPInt32Opt
• linux64GccSPDPInt64Debug
• Alltest: No new error/No change in existing output