Add Bitbucket support to all five SDKs

All five official clients are generated from one V2 specification, so they stay consistent with each other and with the API.

• Added Bitbucket alongside GitHub and GitLab wherever a repository provider is returned, so procedures and deployments connected through Bitbucket now read correctly.
• Improved aggregation values in the C# client to carry any measured type, instead of text only.
• Documented the order phases are returned in: the attempts of a retried phase always arrive in attempt order.
• Removed the conflict error from the station create and update paths, since station names are deliberately not unique and the API never returns it.