Update Oxford2

Context

This merge request updates Oxford protocol code. It includes:

• New protocol hash ProxfordYmVfjWnRcgjWH36fW6PArwqykTFzotUxRs6gmTcZDuH
• Update of proto_oxford code

Manually testing the MR

• Import a recent rolling node snapshot.

• Patch the files for yes wallet/node.

dune exec devtools/yes_wallet/yes_wallet.exe -- create from context data_dir in /tmp/yes-wallet --active-bakers-only
patch -p1 < scripts/yes-node.patch

• Patch the node configutation such that it upgrades the protocol. (with n = head_level +1)

git apply <<EOF
diff --git a/src/lib_node_config/config_file.ml b/src/lib_node_config/config_file.ml
index 8ffaf35e98..f6a7765719 100644
--- a/src/lib_node_config/config_file.ml
+++ b/src/lib_node_config/config_file.ml
@@ -87,6 +87,7 @@ let mainnet_user_activated_upgrades =
   [
     (28082l, "PsYLVpVvgbLhAhoqAkMFUo6gudkJ9weNXhUYCiLDzcUpFpkk8Wt");
     (204761l, "PsddFKi32cMJ2qPjf43Qv5GDWLDPZb3T3bF6fLKiF5HtvHNU7aP");
+    (nl, "ProxfordYmVfjWnRcgjWH36fW6PArwqykTFzotUxRs6gmTcZDuH");
   ]

 (* END_PATCHING_ZONE_FOR_MAINNET_USER_ACTIVATED_UPGRADES *)
EOF
make

• Run the following in one terminal to start the node.

./octez-node run --synchronisation-threshold 0 --connections 0 --rpc-addr localhost

• Run this in another terminal to bake a few blocks:

./octez-client -d /tmp/yes-wallet bake for --minimal-timestamp

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