Add a debug check to ensure all CodeStyle diagnostic descriptors have...

Add a debug check to ensure all CodeStyle diagnostic descriptors have EnforceOnBuild custom tag + Fix the missing tag for IDE0043 identified from this assert

src/Analyzers/Core/Analyzers/ValidateFormatString/AbstractValidateFormatStringDiagnosticAnalyzer.cs

@@ -5,6 +5,7 @@
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Text.RegularExpressions;
+using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Roslyn.Utilities;
@@ -39,7 +40,8 @@ internal abstract class AbstractValidateFormatStringDiagnosticAnalyzer<TSyntaxKi
             DiagnosticCategory.Compiler,
             DiagnosticSeverity.Info,
             isEnabledByDefault: true,
-            description: Description);
+            description: Description,
+            customTags: EnforceOnBuildValues.ValidateFormatString.ToCustomTag());
 
         public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
             => ImmutableArray.Create(Rule);

src/CodeStyle/Tools/Program.cs

@@ -22,6 +22,7 @@ public static class Program
         private const int ExpectedArguments = 4;
 
         private static readonly string s_neverTag = EnforceOnBuild.Never.ToCustomTag();
+        private static readonly string s_whenExplicitlyEnabledTag = EnforceOnBuild.WhenExplicitlyEnabled.ToCustomTag();
         private static readonly string s_recommendedTag = EnforceOnBuild.Recommended.ToCustomTag();
         private static readonly string s_highlyRecommendedTag = EnforceOnBuild.HighlyRecommended.ToCustomTag();
 
@@ -152,6 +153,9 @@ bool AddRule(DiagnosticDescriptor rule)
 
                         (bool isEnabledByDefault, DiagnosticSeverity effectiveSeverity) GetEnabledByDefaultAndSeverity(DiagnosticDescriptor rule, AnalysisMode analysisMode)
                         {
+                            Debug.Assert(rule.CustomTags.Any(c => c == s_neverTag || c == s_whenExplicitlyEnabledTag || c == s_recommendedTag || c == s_highlyRecommendedTag),
+                                $"DiagnosticDescriptor for '{rule.Id}' must have a {nameof(EnforceOnBuild)} custom tag");
+
                             bool isEnabledInNonDefaultMode;
                             switch (analysisMode)
                             {