test(conformance): upgrade gwapi version

[tao12345666333]

What this PR does / why we need it:

Update GWAPI to the last commit before GRPCRoute GA.

Which issue this PR fixes:

part of #5705

Special notes for your reviewer:

#5705 (comment)

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

- [ ] the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@          Coverage Diff           @@
##             main   #5863   +/-   ##
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  Coverage        ?   67.9%           
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  Files           ?     178           
  Lines           ?   18248           
  Branches        ?       0           
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  Hits            ?   12399           
  Misses          ?    4878           
  Partials        ?     971           

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[rainest]

To clarify, you mentioned in chat that this can cause a panic due to an upstream bug: do we have some workaround in place that allows us to merge this despite, is it unlikely enough to appear in practice that we can ignore it for now, or is it enough of a problem that we should hold off until upstream has a fix?

[tao12345666333]

@rainest I have fixed the situation that may cause panic in this PR. Specifically, it is initialized using opts := conformance.DefaultOptions(t).

We can safely merge this PR without waiting for upstream updates.

[mlavacca]

Requesting changes just to have time to properly review the PR

[mlavacca]

Apart from a nit left in the comment, lgtm 👍