Emit codegen_name for response value bodies

[flobernd]

As titled.

The @codegen_name tag for response value bodies was not correctly emitted to the schema.json before.

I took the corresponding code (including the assertion) from the request counterpart. It's debatable wether this should be a hard error or just a validation warning. The assertion is disabled for now, until all places with missing response value body tags are fixed.

[github-actions]

The backport to 8.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-8.x 8.x
# Navigate to the new working tree
cd .worktrees/backport-8.x
# Create a new branch
git switch --create backport-3953-to-8.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 331583c54ed24eb2a33f853eec97776e4fdb1590
# Push it to GitHub
git push --set-upstream origin backport-3953-to-8.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.x

Then, create a pull request where the base branch is 8.x and the compare/head branch is backport-3953-to-8.x.

[github-actions]

The backport to 8.18 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-8.18 8.18
# Navigate to the new working tree
cd .worktrees/backport-8.18
# Create a new branch
git switch --create backport-3953-to-8.18
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 331583c54ed24eb2a33f853eec97776e4fdb1590
# Push it to GitHub
git push --set-upstream origin backport-3953-to-8.18
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.18

Then, create a pull request where the base branch is 8.18 and the compare/head branch is backport-3953-to-8.18.

[pquentin]

💚 All backports created successfully

Status	Branch	Result
✅	8.x
✅	8.18

Questions ?

Please refer to the Backport tool documentation

[pquentin]

Reverted the backports:

• Revert "[8.x] Emit codegen_name for response value bodies (#3953)" #4046
• Revert "[8.18] Emit codegen_name for response value bodies (#3953)" #4047