[ML] Transforms: Edit transforms flyout

[walterra]

The flyout to edit transforms should support available API options:

• description [ML] Transforms: Adds docs_per_second to transform edit form. #65365
• frequency [ML] Transforms: Adds docs_per_second to transform edit form. #65365
• source: useful regarding the query, e.g. to filter out noise
• dest: useful when the user realizes that he wants to use ILM and set an alias here [ML] Transforms: Extend editing and creation options. #77370
• defer_validation
• sync
• settings
  • docs_per_second [ML] Transforms: Adds docs_per_second to transform edit form. #65365
  • max_page_search_size [ML] Transforms: Extend editing and creation options. #77370
• retention policy [ML] Transforms: Adds retention policy options to transform UI. #91162

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• If the update fails, a toast notification is correctly displayed. But when I dismiss the toast, the flyout closes, not allowing the user to correct any mistakes. The flyout should remain open after the toast error is dismissed. This relates to the wrong DOM structure we have, the flyout should be rendered on an outer level than the edit button. — fixed via [ML] DF Analytics / Transforms: Fix job row actions menu invalid DOM nesting warning #74499
• Consider an advanced JSON editor to update transforms.

[elasticmachine]

Pinging @elastic/ml-ui (:ml)