Update clang-format and clang-tidy dependancy

[mehrdad2m]

Context:
As part of updating dependancy versions for the ecosystem, we want to update formatting tools like clang-tidy and clan-format.

Description of the Change:
Bump clang-tidy and clang-format to v20.

Note that I changed the Formatting CI job to install clang-format from the requirements this makes the job consistent with local development environment and allow us to use the latest version that are not yet available on the ubuntu repositories.

Benefits:
Using the latest formatting tools

Possible Drawbacks:

Related GitHub Issues:
[sc-91016]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.51%. Comparing base (0fed865) to head (9051cf6).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1721   +/-   ##
=======================================
  Coverage   96.51%   96.51%           
=======================================
  Files          82       82           
  Lines        9028     9029    +1     
  Branches      861      861           
=======================================
+ Hits         8713     8714    +1     
  Misses        258      258           
  Partials       57       57           

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[mlxd]

Just an FYI, we may want to unify this with Lightning and the ruleset in the guidance repo.

[mehrdad2m]

Just an FYI, we may want to unify this with Lightning and the ruleset in the guidance repo.

Made a PR for lightning and guidance as well.
PennyLaneAI/pennylane-lightning#1153
https://github.com/PennyLaneAI/guidance-docs/pull/67

[dime10]

Looks good!