Fix the issue with using available clang-format version in format

[maliasadi]

make format (and make format-cpp) now accepts the version number in case clang-format is not installed or not satisfying the default version -- that is currently 12. This update avoids inconsistencies between different clang-format aliases and eases trying different versions when needed.

[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.

[github-actions]

Test Report (C++) on Ubuntu

           1 files  ±0             1 suites  ±0   0s ⏱️ ±0s
       711 tests ±0         711 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
228 386 runs  ±0  228 386 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 3a83e74. ± Comparison against base commit 9b585ec.

♻️ This comment has been updated with latest results.

[mlxd]

Awesome work @maliasadi

I re-enabled the failed tests. Once They pass I'll approve

[codecov]

Codecov Report

Merging #288 (3a83e74) into master (9b585ec) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #288   +/-   ##
=======================================
  Coverage   98.86%   98.86%           
=======================================
  Files          27       27           
  Lines        2913     2913           
=======================================
  Hits         2880     2880           
  Misses         33       33           

Impacted Files	Coverage Δ
pennylane_lightning/_version.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9b585ec...3a83e74. Read the comment docs.

[chaeyeunpark]

@maliasadi Thanks for the change (and increase the readability of format)! In fact, I wrote some part of version checking as I had found that the CI does not accept locally formatted C++ codes because of the version difference. Still, I thought it should be refactored as it is hard to read the code there. Thanks for doing this.

[mlxd]

💯