[TraceQL] add support for event attribute query #8224

Job	Run time
Test packages - tempodb/wal	10m 33s
Test packages - pkg	2m 52s
Build	1m 36s
Test serverless integration e2e suite	6m 48s
Test integration e2e suite	28m 5s
Benchmark	9m 19s
Lint	2m 57s
Test packages - others	11m 33s
Test packages - tempodb	15m 41s
Build technical documentation	17s
Check jsonnet & tempo-mixin	44s
Vendor check	1m 3s
	1h 31m 28s

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