fix: support tedge-container-plugin service running as sudo

[reubenmiller]

Ensure environment variables are passed to the tedge-container-plugin service

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
13	0	1	13	100	2m17.700308999s

Passed Tests

Name	⏱️ Duration	Suite
Grace period to allow container to startup	5.003 s	Operations
tedge-container-plugin service is up	0.107 s	Operations
Get Logfile Request	2.356 s	Operations
Get Configuration File	4.646 s	Operations
Execute Shell Command	2.354 s	Operations
Install application using docker compose	15.325 s	Operations
Get Container Logs	2.325 s	Operations
Trigger self update via local command	11.416 s	Self-Update
Self update should only update if there is a new image	4.446 s	Self-Update
Self update using software update operation	86.932 s	Self-Update
Cloud Connection is Online	0.122 s	Telemetry
Service status	0.220 s	Telemetry
Sends measurements	2.449 s	Telemetry