Use BLAS naming for VectorHandler methods

[pelesh]

Description

Updates names of methods in VecorHandler to match BLAS naming convention.

Closes #410

CC @alexander-novo

Proposed changes

• Names of vector operations changed to match BLAS naming scheme as close as possible.
• Updated and corrected Doxygen docs.
• Scalar arguments passed by value.
• assert statements added to aid debugging.

Checklist

• All tests pass (make test and make test_install per testing instructions). Code tested on
  • CPU backend
  • CUDA backend
  • HIP backend
• I have manually run the non-experimental examples and verified that residuals are close to machine precision. (In your build directory run: ./examples/<your_example>.exe -h to get instructions how to run examples). Code tested on:
  • CPU backend
  • CUDA backend
  • HIP backend
• Code compiles cleanly with flags -Wall -Wpedantic -Wconversion -Wextra.
• The new code follows Re::Solve style guidelines.
• There are unit tests for the new code.
• The new code is documented.
• The feature branch is rebased with respect to the target branch.
• I have updated CHANGELOG.md to reflect the changes in this PR. If this is a minor PR that is part of a larger fix already included in the file, state so.

Further comments

Assert statements in gemv fail for some reason. Need to investigate that more; out of scope here.

[alexander-novo]

Shouldn't the infinity norm be amax? iamax returns the index of the maximum value.

[pelesh]

Shouldn't the infinity norm be amax? iamax returns the index of the maximum value.

Good catch. Addressed in 8310c9f.

[kakeueda]

All tests passed with the CUDA backend after fixing VectorHandlerCuda::scal

[shakedregev]

Fix the failing asserts and name convention violations.

[shakedregev]

These are important changes. There are a few naming things that slipped.

[shakedregev]

Approved after testing on Cuda and RocM