test(lb): loosen up assertion lb weights (backport of #11720)

[kumahq]

Automatic cherry-pick of #11720 for branch release-2.5

Generated by action

cherry-picked commit 32f87a1
⚠️ ⚠️ ⚠️ Conflicts happened when cherry-picking! ⚠️ ⚠️ ⚠️

On branch release-2.5
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Changes to be committed:
	modified:   test/e2e_env/multizone/localityawarelb/locality_aware_multizone_hybrid_egress.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   test/e2e_env/universal/trafficroute/traffic_route.go