points - fix gpu conversion to standard indexing for num_comp with rstr AtPoints

Merge pull request #1578 from CEED/jeremy/restriction-points-gpu

GPU Restriction AtPoints

rstr - allow backends to add padding to AtPoints E-vec

hip - add ElemRestrictionAtPoints

Drop JiT Guards in Most QF Source (#1540)

* backend - use pragma once

* gallery - drop source header guards

* ex - drop some qfunction source header guards

* fluids - drop guards on all sin

Drop JiT Guards in Most QF Source (#1540)

* backend - use pragma once

* gallery - drop source header guards

* ex - drop some qfunction source header guards

* fluids - drop guards on all singly included headers

* jit - drop most guards on backend JiT files

* sycl - drop extra header guards

* jit - enable #pragma once for QF source

* fluids - use #pragma once for util/helper qf source

* test - check different multiple includes

* fluids - fix odd include

* jit - update interface for building JiT string from multiple files

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Merge pull request #1537 from CEED/jeremy/pragma-once

Use #pragma once for non-JiT headers

minor - update copyright headers

Merge pull request #1521 from CEED/jeremy/cov-fixes

Reduce Code Duplication

backend - use const for backend rstr data, should never change after set

backend - use new user data copy utility

backend - same memory owned/borrowed strategy for all impls

Merge pull request #1488 from CEED/jeremy/const-path

Const for CeedQFunctionGetSourcePath

internal - more updates for const

Merge pull request #1463 from CEED/jeremy/memcheck-strides

CEED_STRIDES_BACKEND related updates

rstr - fix signature of GetLayout

rstr - add CeedElemRestriction[Get,Set]LLayout

Merge pull request #1450 from CEED/sjg/jit-speedup-dev

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

Merge pull request #1302 from CEED/sjg/gpu-restriction-dev

GPU element restriction for `CEED_RESTRICTION_ORIENTED` and `CEED_RESTRICTION_CURL_ORIENTED`

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

Fix for PEDANTIC

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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Merge pull request #1315 from CEED/jeremy/queep

Backend Consistency Fixes

style - fixes for HIP backends

style - fixes for CUDA backends