Seoul Stabilisation re-snapshot

This MR updates Seoul snapshot as tentative Protocol 23.

⚠️ This protocol is still in stabilisation and should not be proposed until stabilisation period succeeded.

We are trying a new approach with a pre-snapshotted protocol in our repository to avoid renaming and other complexities in particular in tests and documentation during the 'stabilisation to snapshot' step.
Due to the introduction of some changes in protocol code, it had to be resnapshotted (rehashe) since !18232 (merged).

Seoul changes are described in docs/protocols/023_s023.rst.

How

Backport !18450 (merged) and !18435 (merged)

./devtools/patchs/apply_proto_patch.sh -c <commit> src/proto_023_PtSEouLo

Rehash

./scripts/proto_manager.sh --hash --from 023_PtSEouLo --force-snapshot 
[enter]
[enter]
y
7130263421897740
y

Manually testing the MR

make
 ./src/bin_node/octez-sandboxed-node.sh 1 --connections 0 

in a second terminal

eval `./src/bin_client/octez-init-sandboxed-client.sh 1`
octez-activate-023-PtSeouLo

Then, test whatever you want in a sandbox node running the Seoul protocol.

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