Deprecate chunks storage

[pracucci]

In #4268 we announced the chunks storage deprecation but there are other follow up actions we should take. This meta issue is used to track the next actions.

• [ ] Close all issues relating to the chunks storage (list)
• [ ] Stop using chunks storage in the e2e tests
• [ ] Change the default config to blocks storage

[bboreham]

Changing the default to blocks would be very disruptive to someone who is using chunks. We could add a message in the logs saying "You are using deprecated chunks storage"...

[friedrich-at-adobe]

Although experimental in chunks, it would be nice to get the delete series API in blocks https://github.com/cortexproject/cortex/issues/4267

[pstibrany]

Although experimental in chunks, it would be nice to get the delete series API in blocks #4267

There is https://github.com/cortexproject/cortex/pull/4274 proposal for that.

[stale[bot]]

This issue has been automatically marked as stale because it has not had any activity in the past 60 days. It will be closed in 15 days if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had any activity in the past 60 days. It will be closed in 15 days if no further activity occurs. Thank you for your contributions.

[alvinlin123]

We have removed chunkstore support in https://github.com/cortexproject/cortex/pull/4812.