chore: [release-3.0.x] feat: Update getting started demo to Loki 3.0 #12769
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Backport 282e385 from #12723
What this PR does / why we need it:
We needed to update the Loki Getting Started demo to Loki 3.0.
Which issue(s) this PR fixes:
#12722
Special notes for your reviewer:
Currently, the demo still uses Promtail, should we change this to Grafana Alloy or create a new example that uses Alloy as another ingest option?
Checklist
CONTRIBUTING.md
guide (required)docs/sources/setup/upgrade/_index.md
production/helm/loki/Chart.yaml
and updateproduction/helm/loki/CHANGELOG.md
andproduction/helm/loki/README.md
. Example PRdeprecated-config.yaml
anddeleted-config.yaml
files respectively in thetools/deprecated-config-checker
directory. Example PR