Support configurable retention

[CathalMullan]

Is your feature request related to a problem? Please describe.

Currently, there is no way to configure Pyroscope to delete blocks older than a set period.

Describe the solution you'd like

A way to manage block retention similar to other Grafana services.

Describe alternatives you've considered

Using a lifecycle policy with object storage.

[salarali]

Now that 1.0.0 is out, is this still an issue where you have to use lifecycle policies or am I missing a config I can use?

[weisdd]

@kolesnikovae could you, please, add a comment on why the issue got closed? (e.g. the feature has been implemented / docs have been added in PR X)
thx!

[kolesnikovae]

Hi @weisdd! Oh, I should have mentioned this: the retention period is configurable via the -compactor.blocks-retention-period parameter (see docs).

Implemented in #2466