Wait for tracer to be done before finishing workflow

[anbraten]

closes #2197

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.

Project coverage is 26.84%. Comparing base (42e7d71) to head (ce22945).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
agent/rpc/client_grpc.go	0.00%	8 Missing ⚠️
agent/tracer.go	0.00%	5 Missing ⚠️
agent/runner.go	0.00%	3 Missing ⚠️
pipeline/pipeline.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4068      +/-   ##
==========================================
+ Coverage   26.82%   26.84%   +0.01%     
==========================================
  Files         394      394              
  Lines       27341    27342       +1     
==========================================
+ Hits         7335     7340       +5     
+ Misses      19308    19304       -4     
  Partials      698      698              

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[woodpecker-bot]

Tearing down https://woodpecker-ci-woodpecker-pr-4068.surge.sh