#6760 [Proto] Watch group add known sort fields Pull request opened by machichima ## Tracking issue ## Why are the changes needed? Add

KnownSortFields

in watch group request for client to sort by fields. This is needed as watch group in flyte backend use aggregated query which produce new column name, and client has no way to know what are those available column names. ## What changes were proposed in this pull request? Add

KnownSortField

so the client can know about the available sorting options. This way we can add multiple different values where we can parse this later. ## How was this patch tested? ### Labels Please add one or more of the following labels to categorize your PR: • added: For new features. • changed: For changes in existing functionality. • deprecated: For soon-to-be-removed features. • removed: For features being removed. • fixed: For any bug fixed. • security: In case of vulnerabilities This is important to improve the readability of release notes. ### Setup process ### Screenshots ## Check all the applicable boxes • I updated the documentation accordingly. • All new and existing tests passed. • All commits are signed-off. ## Related PRs ## Docs link flyteorg/flyte