Prevent reallocation of aligned memory

[mlxd]

Before submitting

Please complete the following checklist when submitting a PR:

• All new features must include a unit test.
  If you've fixed a bug or added code that should be tested, add a test to the
  tests directory!

• All new functions and code must be clearly commented and documented.
  If you do make documentation changes, make sure that the docs build and
  render correctly by running make docs.

• Ensure that the test suite passes, by running make test.

• Add a new entry to the .github/CHANGELOG.md file, summarizing the
  change, and including a link back to the PR.

• Ensure that code is properly formatted by running make format.

When all the above are checked, delete everything above the dashed
line and fill in the pull request template.

---

Context: To ensure the memory allocated by Lightning is always aligned, and usable by the dispatcher AVX kernels, we must avoid any potential numpy-layer reallocations. This PR extends the aligned allocator functions bound through Pybind11 to allow data to be initialized and set for use. This avoids us needing to perform potential numpy casts, which could potentially reallocate the data. As a result, this removes overheads observed with lightning.qubit workloads depending on the need to handle multiple resets/allocations.

Description of the Change: As above.

Benefits: Removes unneeded overheads from lightning.qubit, and redundant imports from LG/LK

Possible Drawbacks:

Related GitHub Issues:

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit .github/CHANGELOG.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (dfad9d7) 98.48% compared to head (70e5b28) 99.06%.

Files	Patch %	Lines
pennylane_lightning/core/src/utils/Memory.hpp	62.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #572      +/-   ##
==========================================
+ Coverage   98.48%   99.06%   +0.57%     
==========================================
  Files         167      201      +34     
  Lines       24531    29361    +4830     
==========================================
+ Hits        24159    29086    +4927     
+ Misses        372      275      -97     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[maliasadi]

Thanks @mlxd! Looks good to go 🦖

[multiphaseCFD]

Looks good to me! Thanks @mlxd !