ci: Use XRPLF/create-issue

[mathbunnyru]

High Level Overview of Change

I decided to create a separate create-issue action, because we use it quite a lot.
So, let's use it here.
This simplifies the code, and makes it quite straightforward.

Context of Change

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.1%. Comparing base (d050073) to head (93bb163).

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #7076     +/-   ##
=========================================
- Coverage     82.1%   82.1%   -0.0%     
=========================================
  Files         1010    1010             
  Lines        76033   76033             
  Branches      7379    7368     -11     
=========================================
- Hits         62426   62411     -15     
- Misses       13607   13622     +15     

see 7 files with indirect coverage changes

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[godexsoft]

🙏

[Copilot]

Pull request overview

This PR updates the reusable clang-tidy GitHub Actions workflow to use the shared XRPLF/actions/create-issue action for failure issue creation, reducing bespoke shell logic and removing the separate “create-issue-on-failure” job.

Changes:

• Switch clang-tidy failure issue creation from gh issue create + artifact handoff to XRPLF/actions/create-issue.
• Simplify the generated issue body content and keep only filtered clang-tidy output.
• Add godexsoft to the cspell allowlist to avoid spellcheck noise for the new assignee configuration.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
cspell.config.yaml	Adds a GitHub username to the spellchecker allowlist used in CI/config files.
.github/workflows/reusable-clang-tidy.yml	Replaces custom issue-creation job/logic with XRPLF/actions/create-issue and adjusts permissions/issue body content.

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