fix(self-update): remove updater container after collecting logs

[reubenmiller]

Remove the self-update container after the self update has completed (and the logs have been collected from it).

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
19	0	1	19	100	8m24.469108999s

Passed Tests

Name	⏱️ Duration	Suite
Ignore Containers Marked With A Specific Label	27.853 s	Container
Grace period to allow container to startup	5.052 s	Operations
Service is up	0.170 s	Operations
Get Logfile Request	3.163 s	Operations
Get Configuration File	4.811 s	Operations
Execute Shell Command	2.433 s	Operations
Install application using docker compose	15.535 s	Operations
Get Container Logs	2.410 s	Operations
Get Container Logs without explicit container name	2.422 s	Operations
Get Container Logs For Non-existent container	2.414 s	Operations
Update From Legacy Versions	139.292 s	Self-Update-Compat
Trigger self update via local command	27.861 s	Self-Update
Self update should only update if there is a new image	29.470 s	Self-Update
Self update using software update operation	105.766 s	Self-Update
Rollback when trying to install a non-tedge based image	23.921 s	Self-Update
Self update using software update operation using Container type	108.764 s	Self-Update
Cloud Connection is Online	0.184 s	Telemetry
Service status	0.317 s	Telemetry
Sends measurements	2.581 s	Telemetry