Deprecate blocking in favor of block_on_overflow

[bogdandrutu]

Depends on #12706

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 91.50%. Comparing base (7c2c26d) to head (8cfd032).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
exporter/exporterhelper/internal/queue_sender.go	60.00%	4 Missing and 2 partials ⚠️

❌ Your patch status has failed because the patch coverage (60.00%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12710      +/-   ##
==========================================
- Coverage   91.52%   91.50%   -0.02%     
==========================================
  Files         480      480              
  Lines       26452    26464      +12     
==========================================
+ Hits        24211    24217       +6     
- Misses       1774     1778       +4     
- Partials      467      469       +2     

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