Removes unintended % in e2e InferenceModel

[danehans]

Removes an unintended % character in the e2e InferenceModel. The e2e test now passes and validates load balancing across two LoRA adapters (tweet-summary-0 and tweet-summary-1):

$ make test-e2e
...
Ran 1 of 1 Specs in 174.487 seconds
SUCCESS! -- 1 Passed | 0 Failed | 0 Pending | 0 Skipped
--- PASS: TestAPIs (174.49s)
PASS
ok  	inference.networking.x-k8s.io/gateway-api-inference-extension/test/e2e	174.515s

Fixes #249

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[danehans]

#246 also fixes #249 but introduces other changes.

[ahg-g]

I think we need the changes in #246 to ensure that the test doesn't flake

[danehans]

Closing in favor of #246