Proposal for time series deletion with block storage (#4274)

* Add proposal document

Signed-off-by: Gofman <[email protected]>
Signed-off-by: ilangofman <[email protected]>

* Minor text modifications

Signed-off-by: ilangofman <[email protected]>

* Implement requested changes to the proposal

Signed-off-by: ilangofman <[email protected]>

* Fix mention of Compactor instead of purger in proposal

Signed-off-by: ilangofman <[email protected]>

* Fixed wording and spelling in proposal

Signed-off-by: ilangofman <[email protected]>

* Update the cache invalidation method

Signed-off-by: ilangofman <[email protected]>

* Fix wording on cache invalidation section

Signed-off-by: ilangofman <[email protected]>

* Minor wording additions

Signed-off-by: ilangofman <[email protected]>

* Remove white-noise from text

Signed-off-by: ilangofman <[email protected]>

* Remove the deleting state and change cache invalidation

Signed-off-by: ilangofman <[email protected]>

* Add deleted state and update cache invalidation

Signed-off-by: ilangofman <[email protected]>

* Add one word to clear things up

Signed-off-by: ilangofman <[email protected]>

* update api limits section

Signed-off-by: ilangofman <[email protected]>

* ran clean white noise

Signed-off-by: ilangofman <[email protected]>