interface - add Ceed*ReturnCeed

minor - fix tidy warning

internal - more updates for const

internal: const for source paths

Add const to CeedQFunctionLoadSourceToBuffer output argument. If we
had Result, this would look like

let const source_buffer = CeedQFunctionLoadSourceToBuffer()?;

internal: const for source paths

Add const to CeedQFunctionLoadSourceToBuffer output argument. If we
had Result, this would look like

let const source_buffer = CeedQFunctionLoadSourceToBuffer()?;

The caller is free to cast in the const when passing the output variable
if they want this semantic:

let mut source_buffer = CeedQFunctionLoadSourceToBuffer()?;

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backend - add const to QF name acessor

rstr - fix signature of GetLayout

rstr - add CeedElemRestriction[Get,Set]LLayout

GPU - variable name update for conventions

GPU - enable CEED_BASIS_NONE for CUDA, HIP backends

minor - reduce LCOV_EXCL markers

Refactor GPU-backend element restriction source to only compile the required kernels, and do so lazily at first apply

Lazily compile GPU diagonal/point-block diagonal assembly kernels as needed

Also fixes CEED_SIZE -> USE_CEEDSIZE definition.

Add deterministic element restriction transpose GPU kernels for oriented and curl-oriented restrictions

Fix for PEDANTIC

Operator full assembly and diagonal assembly for cuda-ref and hip-ref backends for H(div) and H(curl) elements

Initial commit for cuda-ref and hip-ref backend support for oriented and curl-oriented element restrictions

For now, the element restriction transpose for oriented or curl-oriented cases is always n

Initial commit for cuda-ref and hip-ref backend support for oriented and curl-oriented element restrictions

For now, the element restriction transpose for oriented or curl-oriented cases is always non-deterministic.

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Fix CeedVectorAXPBY

GPU - Don't call diagonal kernels if input arrays are null pointers

H(div) and H(curl) basis support for cuda-ref and hip-ref backends

Non-square operator full assembly (#1316)

* Consistency formatting for operator tests

* Add (failing) test for non-square operator full assembly

* Add support for CPU-based full assembly of no

Non-square operator full assembly (#1316)

* Consistency formatting for operator tests

* Add (failing) test for non-square operator full assembly

* Add support for CPU-based full assembly of non-square CeedOperators

* Fix full assembly of identity quadrature functions and operators with CEED_BASIS_NONE

Also adds a unit test for full assembly which fails prior to the changes in this commit.

* Minor refactor to improve coverage

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Fix some missing consistency issues from #1315

style - fixes for HIP backends

style - fixes for CUDA backends

Merge pull request #1321 from CEED/jeremy/vec-bug

gpu - fix SetArray on device logic bug

gpu - fix SetArray on device logic bug