fix(relayer): only wait for confirmations when not crawling past blocks

[cyberhorsey]

crawling past blocks is slow and uses unnecessary RPC calls when it doesnt need to. this fixes it.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (alpha-6@3416d9b). Click here to learn what that means.

Files	Patch %	Lines
packages/relayer/indexer/handle_event.go	0.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             alpha-6   #16228   +/-   ##
==========================================
  Coverage           ?   27.03%           
==========================================
  Files              ?      102           
  Lines              ?     6096           
  Branches           ?        0           
==========================================
  Hits               ?     1648           
  Misses             ?     4268           
  Partials           ?      180           

Flag	Coverage Δ		*Carryforward flag
eventindexer	17.28% <ø> (?)		Carriedforward from 739a268
guardian-prover-health-check	36.13% <ø> (?)		Carriedforward from 739a268
relayer	37.92% <0.00%> (?)

*This pull request uses carry forward flags. Click here to find out more.

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