mimir update to 6.2.1-bb.1

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/mimir/-/blob/6.2.1-bb.1/CHANGELOG.md

Package MR

big-bang/product/packages/mimir!128 (merged)

For Issue

Closes #3464 (closed)

Upgrade Notices

For a standalone Mimir deployment receiving writes from Cortex Tenant, enable networkPolicies.ingress.to.mimir-distributor:8080.from.k8s.cortex-tenant/cortex-tenant. The Big Bang umbrella enables this connection when Alloy is configured to write through Cortex Tenant.