Merge pull request #1361 from CEED/jrwrigh/external_sgs

fluids: Add external SGS DD inference capability

Merge pull request #1496 from CEED/jrwrigh/ksp_mass

Fluids: Fix mass operator for explicit timestepping, move to KSP for mass operator

fixup! fluids: Use KSP for explicit mass matrix

fluids: Fix mass matrix for explicit time stepping

The local vector should be initialized to zero so that all the essential
nodes (ie. strong boundary condition nodes) are not factored in for the
ma

fluids: Fix mass matrix for explicit time stepping

The local vector should be initialized to zero so that all the essential
nodes (ie. strong boundary condition nodes) are not factored in for the
matrix multiply. The PR associated with this commit should have a
document attached detailing why this is the case.

Previous tests used this incorrect mass matrix and so now fail. The
results for these tests are corrected as well.

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fluids: Use KSP for explicit mass matrix

fluids: Refactor function names

- PascalCase for acronyms longer than 2 letters
- Remove the "Anisotropic" qualifier from function names, as we only
have one data-driven SGS model. If we add an is

fluids: Refactor function names

- PascalCase for acronyms longer than 2 letters
- Remove the "Anisotropic" qualifier from function names, as we only
have one data-driven SGS model. If we add an isotropic model later, we
can give that the "Isotropic" qualifier on it's function names
- Remove the "Model" qualifier from function names. "SgsDD" is
communicative enough (Subgrid-stress inherently means a model)

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Merge pull request #1203 from CEED/jrwrigh/smartsim

fluids: SmartSim Online Data-Driven SGS training

fluids: Add -sgs_train_enable flag

fluids: Add TSPostStep for SGS DD Training

- This will shutdown the simulation if there's a tensor called
`check-run` equal to zeros

Merge pull request #1379 from CEED/jrwrigh/fluids_test_nochange

fluids: Don't set ts_max_steps if not TESTTYPE_NONE

fluids: Don't set ts_max_steps if not TESTTYPE_NONE

Merge pull request #1349 from CEED/jrwrigh/remove_ctx_update

fluids: Use normal `CeedOperatorSetContextDouble` instead of `UpdateContextLabel`

fluids: Use normal CeedOperatorSetContextDouble

That instead of `UpdateContextLabel`, as #1347 built that functionality
into the normal label setting functions themselves

Merge pull request #1233 from CEED/jrwrigh/pbdiagonal_symbolic

Add CeedOperatorLinearAssemblePointBlockDiagonalSymbolic

Add CeedOperatorLinearAssemblePointBlockDiagonalSymbolic

Merge pull request #1270 from CEED/jeremy/constantinople

Rename CEED_BASIS_COLLOCATED to CEED_BASIS_NONE

interface - rename CEED_BASIS_COLLOCATED to CEED_BASIS_NONE

Merge pull request #1259 from CEED/jrwrigh/fluids-cleanup

fluids: Misc cleanup

fluids: Misc changes to functions

fluids: Correct PetscFunction{Return,BeginUser} placement

- Respect the PETSc standard for style (https://petsc.org/release/developers/style/#coding-conventions-and-style)

fluids: Remove misc comments

- Either by inaccuracy of unnecessary

fluids: Make function names in consistent format

- Mainly remove `_` and acronymns with more than 2 letters should
respect CamelCase (ie. `StgFunction` not `STGFunction`)

Merge pull request #1311 from CEED/jrwrigh/fix-fluids-preload

fluids: Fix preloading vector

fluids: Fix preloading vector

- Preloading should use Q_preload, not Q. Otherwise the initial
condition for the "actual" solve is changed by the preload step

Merge pull request #1297 from CEED/jed/fix-fluids-petsc-stage-log

examples/fluids: fix deprecated/dysfunctional PetscLogGetStageLog