WIP TraceQL: Allow comparison duration to `float` #9607

Job	Run time
Lint	3m 26s
Run Unit Tests (test-with-cover-pkg)	3m 12s
Benchmark	9m 32s
Run Unit Tests (test-with-cover-tempodb)	15m 40s
Build	1m 49s
Run Unit Tests (test-with-cover-tempodb-wal)	11m 9s
Run Unit Tests (test-with-cover-others)	12m 34s
Run integration tests (test-e2e)	20m 40s
Vendor check	1m 23s
Run integration tests (test-integration-poller)	10m 8s
Run integration tests (test-e2e-deployments)	13m 34s
Run integration tests (test-e2e-serverless)	7m 8s
Build technical documentation	19s
Check jsonnet & tempo-mixin	46s
	1h 51m 20s

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