Helper for Update Build Status

[BlythMeister]

Description

Add ability for updating build status

This extends on:
#2138
#2139
#2140

So has the features of all 3 of the previous pull requests, but adds a little bit more :)

[BlythMeister]

@matthid in theory, merging this will merge all the others, but you may want to take them separately to ease the review :)

[matthid]

Conflicts should be fixed after merging BlythMeister#5
Note that I changed the API (and the docs) slightly:

let ctx = Target.runOrDefaultAndGetContext "Deploy"  //Could also use: Target.runAndGetOptionalContext "Deploy"
Target.updateBuildStatus ctx
Target.raiseIfError ctx

instead of

Target.runOrDefaultAndGetContext "Deploy"  //Could also use: Target.runAndGetOptionalContext "Deploy"
|> Target.updateBuildStatus 
|> Target.raiseIfError

[matthid]

Ok replaced by #2150 (should be merged by github after merging the other one)

[BlythMeister]

Thanks for all these merges.

There is huge ironey that I don't think I need the features anymore 😂

[matthid]

Care to elaborate?

[BlythMeister]

I realised I could do everything I wanted in my build failure target...