[Task]: Implement soften and harden block actions in the admin

[diox]

Description

Follow-up from https://github.com/mozilla/addons/issues/15013

The admin should support a way to directly change a hard-blocked version to being soft-blocked and vice-versa, with full logging/confirmation like other blocklisting actions.

Acceptance Criteria

  ### Milestones/checkpoints
  - [ ] Blocks can be "hardened" in the admin
  - [ ] Blocks can be "softened" in the admin

Checks

• [X] If I have identified that the work is specific to a repository, I have removed "repository:addons-server" or "repository:addons-frontend"

┆Issue is synchronized with this Jira Task

[diox]

https://github.com/mozilla/addons-server/pull/22827 has some screenshots of the new UI bits. There are notably new harden/soften buttons when you're viewing a block. It should require the same permissions as for creating a block (Blocklist:Create) and the same sign-off as normal if that's a high adu (> 100k) add-on.

All the changes to the blocklist itself haven't landed, but you should be able to view the changes in the admin once processed. A hard blocked version can be softened to a soft-block, a soft-blocked version can be hardened to a hard-block.

[ioanarusiczki]

I'll try to look at this in more detail next week.

I tried it already and so far so good.

soften a block worked with https://reviewers.addons-dev.allizom.org/en-US/reviewers/review/634129 harden a block worked with https://reviewers.addons-dev.allizom.org/en-US/reviewers/review/634130

[ioanarusiczki]

Other test results on AMO dev:

• I don't remember having [Edit submission] next to a version number as in this image or here (I'll re-check)

The stash:

• guids that were hard blocked then softened: show up in stash at unblocked [] and at softblocks []

• guids that were soft blocked then hardened: show up into blocks[]

• harden a soft block, is now blocked in about:addons https://reviewers.addons-dev.allizom.org/en-US/reviewers/review/634113

• soften a hard block is now soft blocked in about:addons https://reviewers.addons-dev.allizom.org/en-US/reviewers/review/634084

[ioanarusiczki]

Other tests on AMO dev:

• harden/soften a version that requires dual sign-off
• delayed dual sign off to harden a soft block
• soften with delay
• checked in stash and in the browser: blocked, softened and deleted for a listed/unlisted extension, theme, dictionary.
• checked in stash and in the browser: blocked, softened, blocked back for
• https://reviewers.addons-dev.allizom.org/en-US/reviewers/review/634266
• multiple guids blocked from admin, blocked or softblocked -> changed them soften/harden, note this can be done on individual guids only
• deleted multiple guids from admin which were soft/hard blocked

Also found into a complex block submission edit submission url