[RFC FS-1070] relax indentations for static members and constructors

[dsyme]

This is the implementation of RFC FS-1070 - Offside relaxations

This permits undentation in these situations:

type OffsideCheck(a:int,
        b:int, c:int, // no warning
        d:int) =
    static member M(a:int,
        b:int, c:int, // no warning
        d:int) = 1

type C() = 
    static member P with get() = 
      1 // no warning

cc @charlesroddie @cartermp

@charlesroddie - Any chance you can write up a brief RFC for this?

[dsyme]

Dodgy test

[xUnit.net 00:02:46.32]     FSharp.Core.UnitTests.FSharp_Core.Microsoft_FSharp_Control.CancellationType.AwaitTaskCancellationAfterAsyncTokenCancellation [FAIL]
Failed   FSharp.Core.UnitTests.FSharp_Core.Microsoft_FSharp_Control.CancellationType.AwaitTaskCancellationAfterAsyncTokenCancellation
Error Message:
 NUnit.Framework.AssertionException : Exception of type 'NUnit.Framework.AssertionException' was thrown.
Stack Trace:
   at FSharp.Core.UnitTests.FSharp_Core.Microsoft_FSharp_Control.CancellationType.AwaitTaskCancellationAfterAsyncTokenCancellation() in D:\a\1\s\tests\FSharp.Core.UnitTests\FSharp.Core\Microsoft.FSharp.Control\Cancellation.fs:line 283
Ok, passed 100 tests.

[dsyme]

Dodgy test. This one is failing a bit too often for my liking (though obviously sometimes succeeding)

Failed   TypeProvider.Disposal.SmokeTest2
Error Message:
 System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
  ----> System.Exception : expected configuration object to be disposed
Stack Trace:

[dsyme]

@charlesroddie - RFC at https://github.com/fsharp/fslang-design/blob/master/RFCs/FS-1070-offside-relaxations.md

[dsyme]

Closing in favour of #6808