Ingester memory improvements by adjusting prealloc #9640

Job	Run time
Benchmark	3m 18s
Build	1m 48s
Run integration tests (test-e2e)	3m 18s
Run integration tests (test-integration-poller)	3m 16s
Lint	43s
Run Unit Tests (test-with-cover-pkg)	3m 14s
Run integration tests (test-e2e-deployments)	3m 18s
Run Unit Tests (test-with-cover-tempodb)	3m 16s
Run integration tests (test-e2e-serverless)	3m 17s
Build technical documentation	23s
Run Unit Tests (test-with-cover-tempodb-wal)	3m 16s
Run Unit Tests (test-with-cover-others)	3m 17s
Check jsonnet & tempo-mixin	56s
Vendor check	1m 26s
	34m 46s

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