[Epic] Connection Page refactoring

[edmundito]

• develop a plan to improve connection creation and editing #13096 Develop a plan for improving the page
• Create ConnectionFormService and migrate Connection workflow to use it #15603
• Migrate Connection-related analytics calls to CreationFormService #15605
• Migrate Connection update calls to use PATCH endpoint #15607
• Rearchitect Connection Forms #15606

[octavia-squidington-iii]

cc @airbytehq/frontend

[jnr0790]

Created issue #14844 with loom recordings for a connection creation bug that resets all table setting changes when editing any of the inputs or drop-downs above the stream settings.

[teallarson]

Other known issues/questions:

• when editing a connection, should unsaved changes be overwritten by source schema refresh/should a user be warned of it
• when creating or editing a connection, make it more obvious how/where to set a cursor field
• should you be able to save a config that has an invalid (but disabled) stream? currently you can.

[edmundito]

@tealjulia Can we declare this epic as done? Can you confirm that what is tracked with Zenhub is correct (and less that what's on the description)?

[teallarson]

What is tracked in the epic is more correct than what is marked in the description. I'll update the description and close this!