Announce breaking changes in environment.action: prepare, verify, access behavior

Goal

Announce breaking changes as a result of

• Environment.action: access and verify should no... (#437142)
• Environment.action: access and prepare should r... (#437133 - closed)
• Environment.action: prepare should require the ... (#437132)

We already announced the upcoming breaking change in a release note. This issue is the create the official deprecation announcements.

Proposal

Create separate announcements to describe the behavior of the different values