Delete Regex timeout tests with RegexOptions.Debug (#61888)

We don't need these tests (the Debug flag is only compiled into Debug builds and is there for diagnostic purposes), and it seems these have been taking too long sporadically. 
Closes #61794

Author: stephentoub

src/libraries/System.Text.RegularExpressions/tests/Regex.Match.Tests.cs

@@ -794,9 +794,7 @@ public void Match_DefaultTimeout_Throws(RegexOptions options)
         // TODO: Figure out what to do with default timeouts for source generated regexes
         [Theory]
         [InlineData(RegexOptions.None)]
-        [InlineData(RegexOptions.None | RegexHelpers.RegexOptionDebug)]
         [InlineData(RegexOptions.Compiled)]
-        [InlineData(RegexOptions.Compiled | RegexHelpers.RegexOptionDebug)]
         public void Match_CachedPattern_NewTimeoutApplies(RegexOptions options)
         {
             const string PatternLeadingToLotsOfBacktracking = @"^(\w+\s?)*$";