fix: add userAgentAppId to Bedrock embedder for code indexing #20359

Job	Run time
knip	55s
check-openrouter-api-key	2s
platform-unit-test (ubuntu-latest)	4m 49s
compile	2m 27s
platform-unit-test (windows-latest)	7m 47s
check-translations	45s
integration-test	3m 0s
	19m 45s

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