feat: queue pending service deletion api calls if the immediate removal fails

[reubenmiller]

Improve the reliability of the service deletions from the cloud in the event that the local Cumulocity proxy (hosted by the tedge-mapper-c8y service) is not available at the time of deletion.

The tedge-container-plugin service will now:

• queue failed service requests and try to delete them on the next status check
• trigger a resync when the tedge-mapper-service is discoverred to be healthy again

Resolves #182

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
39	0	0	39	100	9m27.575931s

Passed Tests

Name	⏱️ Duration	Suite
Get Container Logs	5.529 s	Container-Logs
Get Container Logs with only last N lines	0.630 s	Container-Logs
Get Container Logs By Operation	9.685 s	Container-Logs
Remove Container	8.602 s	Container-Remove
Remove Container Non Existent Container Should Not Through An Error	0.126 s	Container-Remove
Restart Container	0.604 s	Container-Restart
Restart Unknown Container Fails	0.140 s	Container-Restart
Update to tedge-container-plugin-ng	22.463 s	Installation
Check for Update	6.933 s	Operations-Clone
Clone Existing Container	27.743 s	Operations-Clone
Clone Existing Container by Timeout Whilst Waiting For Exit	18.348 s	Operations-Clone
Clone Existing Container but Waiting For Exit	25.544 s	Operations-Clone
Ignore Containers With Given Label	21.314 s	Operations-Clone
Install/uninstall container-image	16.495 s	Operations-Container-Image
Install/uninstall not existent container image	6.777 s	Operations-Container-Image
Install/uninstall container package from private repository - credentials file	12.621 s	Operations-Private-Registries
Install/uninstall container package from private repository - credentials script	14.979 s	Operations-Private-Registries
Install/uninstall container package from private repository - credentials script with cache	20.195 s	Operations-Private-Registries
Install/uninstall container package from private repository - engine credentials	17.828 s	Operations-Private-Registries
Install/uninstall container package from private repository - docker from docker	51.739 s	Operations-Private-Registries
Get Configuration	5.069 s	Operations
Install/uninstall container-group package	19.101 s	Operations
Install/uninstall container-group package with non-existent image	11.080 s	Operations
Install invalid container-group	3.154 s	Operations
Install container-group with multiple files - app1	15.961 s	Operations
Install container-group with multiple files - app2	7.646 s	Operations
Install/uninstall container package	17.313 s	Operations
Install/uninstall container package from file	11.523 s	Operations
Manual container creation/deletion	17.428 s	Operations
Manual container creation/deletion with error on run	7.385 s	Operations
Manual container created and then killed	10.131 s	Operations
Remove Orphaned Cloud Services	19.551 s	Operations
Remove Orphaned Cloud Services eventually if Cumulocity Proxy is Unavailable at deletion time	39.070 s	Operations
Install container group that uses host volume mount	7.744 s	Operations
Self Update Is Present Using Self Type	0.189 s	Self
Self Update Is Present Using Container Type	0.190 s	Self
Self Update Is Not Present	0.191 s	Self
Service status	17.070 s	Telemetry-Main
Sends measurements	69.488 s	Telemetry-Main