Fix race in pipeline runtime

[6543]

as step tracer is also used to update workflow environment variables

taken from #6391

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 35.32%. Comparing base (a025e4c) to head (103ab78).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6451   +/-   ##
=======================================
  Coverage   35.31%   35.32%           
=======================================
  Files         431      431           
  Lines       28779    28782    +3     
=======================================
+ Hits        10163    10166    +3     
  Misses      17685    17685           
  Partials      931      931           

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