Improve string manipulation performance

Specifying StringComparison.Ordinal where possible will make operations
faster, especially for large queries, especially when running on Linux.
The culture sesitive string operations are significantly slower on Linux
compared to Windows (dotnet/runtime#37919).

Author: cosminvlad

src/EntityFramework.DynamicFilters.Shared/DynamicFilterExtensions.cs

@@ -940,7 +940,7 @@ private static void RemoveFilterDisabledConditionFromQuery(DbCommand command, Db
                    (paramIdx = command.CommandText.IndexOf(param.ParameterName + " IS NOT NULL", curIdx, StringComparison.OrdinalIgnoreCase)) != -1)
             {
                 int startIdx = command.CommandText.LastIndexOf("or", paramIdx, StringComparison.OrdinalIgnoreCase);
-                int endIdx = command.CommandText.IndexOf(')', paramIdx);
+                int endIdx = command.CommandText.IndexOf(")", paramIdx, StringComparison.Ordinal);
 
                 if (endIdx == -1)
                 {
@@ -955,7 +955,7 @@ private static void RemoveFilterDisabledConditionFromQuery(DbCommand command, Db
                     //  (note the extra ()'s which are not present in PostgreSQL).
                     //  So while we found the ending ")", we may or may not want to actually remove it.
                     //  Determine that by checking for the presence of an opening "(" in between the "or" and the parameter name
-                    var openingParenIndex = command.CommandText.IndexOf('(', startIdx);
+                    var openingParenIndex = command.CommandText.IndexOf("(", startIdx, StringComparison.Ordinal);
                     if ((openingParenIndex < startIdx) || (openingParenIndex > paramIdx))
                         endIdx--;       //  Do not have opening paren so do not remove the trailing ")"!
                 }
@@ -996,7 +996,7 @@ private static void SetParameterList(IEnumerable paramValueCollection, DbParamet
             int prevStartIndex = 0;
             int paramStartIdx;
             bool isNotCondition = false;
-            while ((paramStartIdx = command.CommandText.IndexOf(param.ParameterName, prevStartIndex)) != -1)
+            while ((paramStartIdx = command.CommandText.IndexOf(param.ParameterName, prevStartIndex, StringComparison.OrdinalIgnoreCase)) != -1)
             {
                 int startIdx = FindLastComparisonOperator(command.CommandText, paramStartIdx, out isNotCondition);
                 if (startIdx == -1)
@@ -1058,11 +1058,11 @@ private static int FindLastComparisonOperator(string commandText, int fromIdx, o
             //  possible for us to match on a condition that is earlier in the sql statement.
 
             //  MySql uses "!=" syntax.  Not possible to find both.
-            int notEqualIdx = commandText.LastIndexOf("!=", fromIdx, 10);
+            int notEqualIdx = commandText.LastIndexOf("!=", fromIdx, 10, StringComparison.Ordinal);
             if (notEqualIdx == -1)
-                notEqualIdx = commandText.LastIndexOf("<>", fromIdx, 10);
+                notEqualIdx = commandText.LastIndexOf("<>", fromIdx, 10, StringComparison.Ordinal);
 
-            int equalIdx = commandText.LastIndexOf("=", fromIdx, 10);
+            int equalIdx = commandText.LastIndexOf("=", fromIdx, 10, StringComparison.Ordinal);
             if (equalIdx == notEqualIdx + 1)    //  Don't want to match on the "=" in "!="
                 equalIdx = -1;