Perf job: send if node modified to build bindings conditionally

[lferran]

Description

Describe the proposed changes made in this PR.

How was this PR tested?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1b1a066) 82.04% compared to head (4921fc2) 82.07%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1701      +/-   ##
==========================================
+ Coverage   82.04%   82.07%   +0.03%     
==========================================
  Files         333      333              
  Lines       19400    19400              
==========================================
+ Hits        15916    15923       +7     
+ Misses       3484     3477       -7     

Flag	Coverage Δ
ingest	69.25% <ø> (ø)
node-sidecar	95.62% <ø> (+1.61%)	⬆️
nucliadb	70.38% <ø> (ø)
reader	76.90% <ø> (ø)
sdk	40.46% <ø> (ø)
train	63.33% <ø> (ø)
utils	81.24% <ø> (ø)
writer	85.69% <ø> (ø)

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