chore(fast-usdc): prune testBorrow, testRepay methods #38378

Job	Run time
pre_check / Check preconditions and cancel previous jobs	4s
deployment-test	31m 39s
test-docker-build	43m 22s
getting-started (link-cli/yarn)	10m 22s
getting-started (registry/yarn)	14m 32s
getting-started (registry/npm)	14m 12s
getting-started (registry/npx)	14m 27s
test-multichain-e2e / Multichain E2E (Orchestration API) / multichain-e2e	34m 4s
test-multichain-e2e / Multichain E2E (Fast USDC) / multichain-e2e	10m 15s
finalize-integration-result	4s
	2h 53m 1s

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