Update clang-format standard to c++17

[mcbarton]

Description

Please include a summary of changes, motivation and context for this PR.

Since cling 1.0 support got dropped the minimum c++ standard supported by CppInterOp was c++17 . Therefore this PR updates the clang-format standard CppInterOp is using to c++17. This a valid value and was taken from xeus-cpp (see https://github.com/compiler-research/xeus-cpp/blob/7a3a24bbbdcc82f8626b71ed7a3028a637923ce3/.clang-format#L76C11-L76C16)

Fixes # (issue)

Type of change

Please tick all options which are relevant.

• Bug fix
• New feature
• Requires documentation updates

Testing

Please describe the test(s) that you added and ran to verify your changes.

Checklist

• I have read the contribution guide recently

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.78%. Comparing base (180869d) to head (6ce86c2).
⚠️ Report is 53 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #645   +/-   ##
=======================================
  Coverage   78.78%   78.78%           
=======================================
  Files           9        9           
  Lines        3851     3851           
=======================================
  Hits         3034     3034           
  Misses        817      817           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[aaronj0]

LGTM!