Tempo-query: improve performance of FindTraces #9259

Job	Run time
Run Unit Tests (test-with-cover-pkg)	3m 14s
Run Unit Tests (test-with-cover-tempodb)	15m 58s
Benchmark	9m 27s
Run Unit Tests (test-with-cover-tempodb-wal)	11m 32s
Run Unit Tests (test-with-cover-others)	12m 25s
Build	1m 48s
Run integration tests (test-e2e)	20m 15s
Run integration tests (test-integration-poller)	9m 36s
Vendor check	1m 25s
Lint	3m 14s
Run integration tests (test-e2e-deployments)	13m 1s
Run integration tests (test-e2e-serverless)	6m 55s
Build technical documentation	18s
Check jsonnet & tempo-mixin	45s
	1h 49m 53s

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