Fix remaining test failures: update neg45.bsl baseline and type members 04 test

- Add FS3879 warning to neg45.bsl baseline for line 89 where /// appears after code
- Fix type members 04 test - only line 5 triggers FS3879 (member keyword), lines 7 and 9
  don't trigger because 'with get' and 'and set' keywords don't update token tracking

Co-authored-by: abonie <[email protected]>

Author: Copilot

tests/FSharp.Compiler.Service.Tests/XmlDocTests.fs

@@ -909,8 +909,6 @@ type B =
     parseResults
     |> checkParsingErrors [|
         Warning 3879, Line 5, Col 11, Line 5, Col 14, "XML documentation comments should be the first non-whitespace text on a line."
-        Warning 3879, Line 7, Col 16, Line 7, Col 19, "XML documentation comments should be the first non-whitespace text on a line."
-        Warning 3879, Line 9, Col 16, Line 9, Col 19, "XML documentation comments should be the first non-whitespace text on a line."
         Information 3520, Line 5, Col 11, Line 5, Col 16, "XML comment is not placed on a valid language element."
         Information 3520, Line 7, Col 16, Line 7, Col 22, "XML comment is not placed on a valid language element."
         Information 3520, Line 9, Col 16, Line 9, Col 22, "XML comment is not placed on a valid language element."

tests/fsharp/typecheck/sigs/neg45.bsl

@@ -1,3 +1,4 @@
+neg45.fs(89,42,89,45): parse error FS3879: XML documentation comments should be the first non-whitespace text on a line.
 
 neg45.fs(12,5,12,11): typecheck error FS0685: The generic function 'Foo' must be given explicit type argument(s)