Try speed up benchmark prep steps

[cijothomas]

3.5 minutes spend on preparing the dedicated machine. Attempting to optimize this.
If this helps, I'll move this to a common script and re-use in all workflows. (we have 4 now, but likely to add more)

[cijothomas]

@jmacd can you add "pipelineperf" label, so we can verify this works!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.09%. Comparing base (a0c0fb9) to head (f931cf1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1619      +/-   ##
==========================================
- Coverage   84.12%   84.09%   -0.04%     
==========================================
  Files         447      447              
  Lines      127449   127449              
==========================================
- Hits       107214   107174      -40     
- Misses      19701    19741      +40     
  Partials      534      534              

Components	Coverage Δ
otap-dataflow	85.81% <ø> (-0.06%)	⬇️
query_abstraction	80.61% <ø> (ø)
query_engine	89.98% <ø> (ø)
syslog_cef_receivers	∅ <ø> (∅)
otel-arrow-go	53.50% <ø> (ø)

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