Fix regex pattern in TfsWorkItemMigrationProcessorOptionsValidator (#2970)

This pull request updates the regular expression used to detect the
`[System.TeamProject] = @TeamProject` condition in queries, making it
more robust by allowing optional single quotes around `@TeamProject`.

- Improved query validation:
* Updated the regular expression in
`TfsWorkItemMigrationProcessorOptionsValidator.cs` to match
`[System.TeamProject] = @TeamProject` with or without single quotes
around `@TeamProject`, increasing flexibility and reducing false
negatives.

Fixes  #2915

Co-Authored-By:  colin-cdp <[email protected]>

Author: MrHinsh

src/MigrationTools.Clients.TfsObjectModel/Processors/TfsWorkItemMigrationProcessorOptionsValidator.cs

@@ -13,7 +13,7 @@ public class TfsWorkItemMigrationProcessorOptionsValidator : IValidateOptions<Tf
     {
         public ValidateOptionsResult Validate(string name, TfsWorkItemMigrationProcessorOptions options)
         {
-            
+
             var errors = new List<string>();
             ValidateOptionsResult baseResult = options.Validate(name, options);
             if (baseResult != ValidateOptionsResult.Success)
@@ -50,7 +50,7 @@ public ValidateOptionsResult Validate(string name, TfsWorkItemMigrationProcessor
         private bool ContainsTeamProjectCondition(string query)
         {
             // Regex to match '[System.TeamProject] = @TeamProject'
-            string teamProjectPattern = @"\[System\.TeamProject\]\s*=\s*@TeamProject";
+            string teamProjectPattern = @"\[System\.TeamProject\]\s*=\s*'?@TeamProject'?";
 
             return Regex.IsMatch(query, teamProjectPattern, RegexOptions.IgnoreCase);
         }