ci: remove ci_pipeline workflow and dependencies

[reubenmiller]

Proposed changes

Remove the ci_pipeline workflow and dependencies as it only duplicated the system tests covered by the integration-tests workflow (which uses RobotFramework tests)

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (862357a) 75.9% compared to head (8181668) 75.9%.
Report is 19 commits behind head on main.

Additional details and impacted files

Files	Coverage Δ
crates/core/c8y_api/src/json_c8y.rs	90.5% <100.0%> (ø)
crates/extensions/tedge_config_manager/src/lib.rs	87.7% <94.7%> (ø)
...rates/extensions/tedge_config_manager/src/tests.rs	89.9% <96.1%> (ø)
crates/extensions/tedge_log_manager/src/lib.rs	83.7% <87.5%> (ø)
crates/extensions/tedge_log_manager/src/tests.rs	89.0% <93.7%> (ø)
plugins/tedge_log_plugin/src/lib.rs	0.0% <0.0%> (ø)
crates/extensions/tedge_log_manager/src/config.rs	0.0% <0.0%> (ø)
crates/core/tedge_agent/src/agent.rs	0.0% <0.0%> (ø)

... and 3 files with indirect coverage changes

[didier-wenzek]

Approved

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
389	0	3	389	100	50m48.995s

[rina23q]

Good cleanup of our old stuff 👍