[Go SDK] wrap a failed last data/timer send like Flush

[igor-dv]

fixes #40405

Add "errors.Wrapf" for the last send error in dataWriter.Close and timerWriter.Close()

[github-actions]

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[damccorm]

Thanks! Could you please resolve the merge conflicts? If so, I can merge

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.63%. Comparing base (76f6e6d) to head (4ac2e09).
⚠️ Report is 111 commits behind head on master.

Files with missing lines	Patch %	Lines
sdks/go/pkg/beam/core/runtime/harness/datamgr.go	66.66%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #40406      +/-   ##
============================================
+ Coverage     56.16%   57.63%   +1.46%     
  Complexity     2288     2288              
============================================
  Files          1124     1125       +1     
  Lines        178336   167497   -10839     
  Branches       1489     1489              
============================================
- Hits         100170    96539    -3631     
+ Misses        75645    68419    -7226     
- Partials       2521     2539      +18     

Flag	Coverage Δ
go	28.46% <66.66%> (-0.67%)	⬇️

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[igor-dv]

Thanks @damccorm. Fixed