Disable nested child device operation support #2409

[albinsuresh]

Proposed changes

Disable operation support for:

• nested child devices
• services on any device

This is just a temporary fix for #2409 to avoid nested child devices and services from messing up the mapper's operations directory, which only supports immediate child devices. A proper fix will be coming in a later PR.

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

#2409

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

Merging #2424 (2a94d86) into main (23e71d9) will increase coverage by 0.0%.
The diff coverage is 85.6%.

❗ Current head 2a94d86 differs from pull request most recent head c91524a. Consider uploading reports for the commit c91524a to get more accurate results

Additional details and impacted files

Files	Coverage Δ
...extensions/c8y_mapper_ext/src/config_operations.rs	87.4% <ø> (+0.1%)	⬆️
crates/extensions/c8y_mapper_ext/src/error.rs	0.0% <ø> (ø)
crates/extensions/c8y_mapper_ext/src/converter.rs	80.9% <85.6%> (+0.5%)	⬆️

... and 7 files with indirect coverage changes

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
356	0	3	356	100	1h9m8.281s

[rina23q]

The code looks okayish. I would like to decide if I approve or not after @albinsuresh replies to my comments.

[rina23q]

As a temporary fix, I would approve. I assume that some minor points will be refactored in the following PR.