[service] Ensure test service eventually connects to telemetry port on restart

[MovieStoreGuy]

Description:

There appears to be a flake in waiting for resources being released within tests:

    service_test.go:345: 
        	Error Trace:	/home/runner/work/opentelemetry-collector/opentelemetry-collector/service/service_test.go:345
        	Error:      	Received unexpected error:
        	            	Get "http://localhost:8888/metrics": dial tcp [::1]:8888: connect: connection refused
        	Test:       	TestServiceTelemetryRestart

See test run: https://github.com/open-telemetry/opentelemetry-collector/actions/runs/5267677421/jobs/9523273917?pr=7703

Link to tracking Issue:

NA

Testing:
NA

Documentation:
NA

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (45d9a9e) 91.14% compared to head (de1cd6e) 91.14%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7893   +/-   ##
=======================================
  Coverage   91.14%   91.14%           
=======================================
  Files         298      298           
  Lines       14915    14915           
=======================================
  Hits        13594    13594           
  Misses       1045     1045           
  Partials      276      276           

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