Paris: Update protocol for Paris-A 🇫🇷

What

Updates the protocol for ParisA

Why

The stabilisation period is ending.

How

See https://gitlab.com/tezos/tezos/-/issues/6869#updating-the-protocol-p for details on the process

• Update the protocol hash with the new one
• Update proto_PtParisA/lib_protocol/ according to proto-p
• Forwardport other changes from proto-p for Paris-A
• Update RPC documentation
• Reset regressions files

Manually testing the MR

See https://gitlab.com/tezos/tezos/-/issues/6869#manually-testing-the-protocol-on-a-mainnet-context to manually test the protocol migration

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR