Reorder modifiers according to preferred order (#12864)

# PR Summary

Reformat using `csharp_preferred_modifier_order`.

## PR Context

Split change from #11773

## PR Checklist

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src/Microsoft.PowerShell.Commands.Utility/commands/utility/CsvCommands.cs

@@ -853,9 +853,9 @@ namespace Microsoft.PowerShell.Commands
     internal class ExportCsvHelper : IDisposable
     {
         private char _delimiter;
-        readonly private BaseCsvWritingCommand.QuoteKind _quoteKind;
-        readonly private HashSet<string> _quoteFields;
-        readonly private StringBuilder _outputString;
+        private readonly BaseCsvWritingCommand.QuoteKind _quoteKind;
+        private readonly HashSet<string> _quoteFields;
+        private readonly StringBuilder _outputString;
 
         /// <summary>
         /// Create ExportCsvHelper instance.

src/Microsoft.PowerShell.Security/security/CertificateProvider.cs

@@ -506,7 +506,7 @@ namespace Microsoft.PowerShell.Commands
         /// </summary>
         [TraceSource("CertificateProvider",
                       "The core command provider for certificates")]
-        private readonly static PSTraceSource s_tracer = PSTraceSource.GetTracer("CertificateProvider",
+        private static readonly PSTraceSource s_tracer = PSTraceSource.GetTracer("CertificateProvider",
                       "The core command provider for certificates");
 
         #endregion tracer