Feature/avx512 float

Issue/feature addressed

We have only implemented scalar and avx2 backends for floats

Proposed solution

Implements avx512 backend for floats

Implementation

...

Tests

Minor modifications to the existing unit tests was needed

Notes

This MR depends on !1255 (merged) SVE and SSE2 still need to be implemented

Checklist

• Functions and classes, or changes to them, are documented.
• User guide/documentation is updated.
• Changelog is updated.
• Suitable tests added for new functionality.
• Newly added files are correctly formatted.
• License added to any new files.
• No extraneous files have been added (e.g. compiler output or test data files).