[validation-errors] Fixes in watcher API

[Anaethelion]

• Add a cancelled property to TaskInfo.
• Add UserDefinedValue in FieldValue union.
• Fix watcher input and conditions.

Fixes #1886

[sethmlarson]

Looking great, here's a handful of comments:

[sethmlarson]

I've resolved my comment on structure, thanks for the explanation on how this is different from a container variant. Will approve once other changes are in

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
tasks.cancel	🟢	2/2	2/2
tasks.get	🟢	10/10	10/10
tasks.list	🟢	9/9	9/9
watcher.ack_watch	🟢	1/1	1/1
watcher.activate_watch	🟢	1/1	1/1
watcher.deactivate_watch	🟢	1/1	1/1
watcher.delete_watch	🟢	2/2	2/2
watcher.execute_watch	🟢	7/7	7/7
watcher.get_watch	🟢	9/9	9/9
watcher.put_watch	🔴	29/38	38/38
watcher.query_watches	⚪	Missing test	Missing test
watcher.start	🟢	1/1	1/1
watcher.stats	🟢	1/1	1/1
watcher.stop	🟢	1/1	1/1

You can validate these APIs yourself by using the make validate target.

[sethmlarson]

LGTM

[github-actions]

The backport to 7.17 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-7.17 7.17
# Navigate to the new working tree
cd .worktrees/backport-7.17
# Create a new branch
git switch --create backport-1889-to-7.17
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 d8b3a91ea0f5d71a383cae53ad66ee64f3aa262e
# Push it to GitHub
git push --set-upstream origin backport-1889-to-7.17
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-7.17

Then, create a pull request where the base branch is 7.17 and the compare/head branch is backport-1889-to-7.17.

[github-actions]

The backport to 7.17 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-7.17 7.17
# Navigate to the new working tree
cd .worktrees/backport-7.17
# Create a new branch
git switch --create backport-1889-to-7.17
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 d8b3a91ea0f5d71a383cae53ad66ee64f3aa262e
# Push it to GitHub
git push --set-upstream origin backport-1889-to-7.17
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-7.17

Then, create a pull request where the base branch is 7.17 and the compare/head branch is backport-1889-to-7.17.