Integration Tests for UTF-8 validation mode

[yeya24]

Is your feature request related to a problem? Please describe.
We want to have enough tests coverage for UTF-8 support in Cortex. Integration test is a good way to test this end to end.

Describe the solution you'd like

Add new UTF-8 test cases to existing integration test suite. We should try to have test cases on all Cortex features that might be relevant to UTF-8 names.

• Ingestion
  • Cortex should be able to ingest time series, metadata, exemplars with UTF-8 names successfully through remote write
• Query
  • Cortex should be able to query data containing UTF-8 names.
  • Test should cover both Ingester and Store Gateway
  • Cover all Query APIs such as Instant, Range Query, Label Names, Label Values, Metadata, Exemplars, etc
• Rules
  • Cortex should be able to use rules with UTF-8 names
  • Rules with UTF-8 names should be evaluated successfully for both alerting and recording rules
  • Rule APIs should support UTF-8 names
• Alertmanager
  • Cortex should be able to use alertmanager configs with UTF-8 names
  • AlertManager APIs should support UTF-8 names
• Others
  • OTLP

[TheKongers]

Currently working on this