[DOC] Add zone-aware ingesters doc #10106

Job	Run time
Build	1m 57s
Benchmark	9m 40s
Run integration tests (test-e2e)	20m 45s
Lint	3m 26s
Run Unit Tests (test-with-cover-pkg)	3m 48s
Run integration tests (test-integration-poller)	10m 5s
Build technical documentation	21s
Run integration tests (test-e2e-deployments)	13m 34s
Run Unit Tests (test-with-cover-tempodb)	16m 14s
Run integration tests (test-e2e-serverless)	7m 10s
Run Unit Tests (test-with-cover-tempodb-wal)	11m 19s
Check jsonnet & tempo-mixin	55s
Run Unit Tests (test-with-cover-others)	13m 5s
Vendor check	1m 21s
	1h 53m 40s

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