C#: Grpc.Tools: Handle regex timeout when parsing protoc output (#36185)

Fix for https://github.com/grpc/grpc/issues/36162

Increase the regex timeout to 1 second. If a timeout occurs then log that the line could not be parsed.

Closes #36185

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36185 from tonydnewell:grpc.tools-regex-timeout 324b301d40
PiperOrigin-RevId: 620767619

src/csharp/Grpc.Tools/ProtoCompile.cs

@@ -126,7 +126,7 @@ namespace Grpc.Tools
                                                         "javanano", "js", "objc",
                                                         "php", "python", "ruby" };
 
-        static readonly TimeSpan s_regexTimeout = TimeSpan.FromMilliseconds(100);
+        static readonly TimeSpan s_regexTimeout = TimeSpan.FromSeconds(1);
 
         static readonly List<ErrorListFilter> s_errorListFilters = new List<ErrorListFilter>()
         {
@@ -590,6 +590,8 @@ namespace Grpc.Tools
         protected override void LogEventsFromTextOutput(string singleLine, MessageImportance messageImportance)
         {
             foreach (ErrorListFilter filter in s_errorListFilters)
+            {
+                try
                 {
                     Match match = filter.Pattern.Match(singleLine);
 
@@ -598,6 +600,10 @@ namespace Grpc.Tools
                         filter.LogAction(Log, match);
                         return;
                     }
+                } catch (RegexMatchTimeoutException)
+                {
+                    Log.LogWarning("Unable to parse output from protoc. Regex timeout.");
+                }
             }
 
             base.LogEventsFromTextOutput(singleLine, messageImportance);