chore: remove deprecated and unused plugins

[reubenmiller]

Proposed changes

Cleaning up project and removing the following:

• Remove the deprecated binaries
  • c8y-configuration-plugin
  • c8y-log-plugin
  • tedge-configuration-plugin (already part of the multi-call binary)
  • tedge-log-plugin (already part of the multi-call binary)
• Remove main.rs files from crates which are provided under the multi-call tedge binary
• Remove sawtooth-publisher (as it was not used and not maintained - still using older v0 MQTT API)
• Remove build logic to handle test packages as there are no longer any test packages
• Default build setting to skip building of deprecated packages (though currently there are none)

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

• Cleanup the code of deprecated plugins #2698
• Make tedge-mapper and tedge-agent only available as symlink to tedge  #2696 (partially fulfilled...the symlinks are not created as suggested in the ticket)

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

All modified and coverable lines are covered by tests ✅

Comparison is base (2e25b52) 76.9% compared to head (43495f2) 77.3%.
Report is 5 commits behind head on main.

Additional details and impacted files

Files	Coverage Δ
...edge_config/src/system_services/managers/config.rs	89.5% <ø> (-0.4%)	⬇️

... and 10 files with indirect coverage changes

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
386	0	3	386	100	51m17.933s

[albinsuresh]

I still see some references to the old plugins in the bootstrap.sh and the uninstall-thin-edge_io.sh scripts. Intentional for backward compatibility?

[reubenmiller]

I still see some references to the old plugins in the bootstrap.sh and the uninstall-thin-edge_io.sh scripts. Intentional for backward compatibility?

Yes I left those parts parts because they are still used when testing older setups.

We'll have to address the old uninstall script separately as there are some UX questions there...