Enable SA1507: Code should not contain multiple blank lines in a row (#14136)

https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1507.md

.globalconfig

@@ -1374,7 +1374,7 @@ dotnet_diagnostic.SA1505.severity = none
 dotnet_diagnostic.SA1506.severity = none
 
 # SA1507: Code should not contain multiple blank lines in a row
-dotnet_diagnostic.SA1507.severity = none
+dotnet_diagnostic.SA1507.severity = warning
 
 # SA1508: Closing braces should not be preceded by blank line
 dotnet_diagnostic.SA1508.severity = none

src/System.Management.Automation/engine/TypeTable_Types_Ps1Xml.cs

@@ -9227,7 +9227,6 @@ namespace System.Management.Automation.Runspaces
 #if UNIX
             #region UnixStat
 
-
             if (ExperimentalFeature.IsEnabled("PSUnixFileStat"))
             {
                 typeName = @"System.IO.FileSystemInfo";

src/powershell/Program.cs

@@ -185,7 +185,6 @@ namespace Microsoft.PowerShell
                     // We can reuse this value later to prevent needing to call a .NET API
                     // to generate our exec invocation.
 
-
                     // We don't care about argc's value, since argv[0] must always exist.
                     // Skip over argc, but remember where exec_path is for later
                     executablePathPtr = IntPtr.Add(procargs, sizeof(int));

test/tools/WebListener/Controllers/DosController.cs

@@ -22,7 +22,6 @@ namespace mvc.Controllers
 
             Response.StatusCode = 200;
 
-
             StringValues dosType;
             if (Request.Query.TryGetValue("dosType", out dosType))
             {