Wire up the components with main

[srikanthccv]

Part of SigNoz/signoz#1786

See first #57

This PR wires up the service package with the main package, make all components glued up, and enables the collector to run as a remote-controlled agent.

[srikanthccv]

@rkssisodiya This has the following changes besides the piecing together OpAMP with the main

• wait indefinitely until the collector receives the first config
• restart the collector even if the config hasn’t changed for the first time (the OpAMP server may not have anything new to offer)
• handle some async errors from the collector service
• make OpAMP optional when the manager config (i.e Server URL) is not provided

[srikanthccv]

@rkssisodiya I resolved the comments and did some cleanup. Please take another look. This is also good for testing/using. Let me know if there are any issues.