Fix: fix terminate suspending steps

[FogDong]

Description of your changes

🤖 Generated by Copilot at ecaa84c

Summary

🧪🛑🔄

This pull request enhances the TerminateWorkflow function to handle suspending workflow steps. It also updates the unit tests in operation_test.go to cover this new feature.

Oh we are the coders of the operation package
We write the tests to make our code more savage
We heave and we ho and we TerminateWorkflow
And we don't let the suspending steps slow us down

Walkthrough

• Add a case for suspending workflow steps in TerminateWorkflow function (link, link)
• Update existing test case for TerminateWorkflow function to match new logic (link)
• Add a new test case for TerminateWorkflow function to cover suspending scenario (link)

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: +0.01 🎉

Comparison is base (0e77b2b) 61.17% compared to head (ecaa84c) 61.18%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5872      +/-   ##
==========================================
+ Coverage   61.17%   61.18%   +0.01%     
==========================================
  Files         223      223              
  Lines       30980    30980              
==========================================
+ Hits        18951    18956       +5     
- Misses      10264    10265       +1     
+ Partials     1765     1759       -6     

Flag	Coverage Δ
core-unittests	55.81% <50.00%> (+0.02%)	⬆️
e2e-multicluster-test	25.33% <0.00%> (+0.03%)	⬆️
e2etests	26.75% <ø> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/workflow/operation/operation.go	39.57% <50.00%> (+1.31%)	⬆️

... and 10 files with indirect coverage changes

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[github-actions]

Successfully created backport PR for release-1.8:

• [Backport release-1.8] Fix: fix terminate suspending steps #5874