Support C89 in Completion Prompts (#13132)

- Also send unrecognized ones in telementry for further ananlysis.

Author: kuchungmsft

Extension/src/LanguageServer/lmTool.ts

@@ -38,7 +38,7 @@ const knownValues: { [Property in keyof ChatContextResult]?: { [id: string]: str
         'c++17': 'C++17',
         'c++20': 'C++20',
         'c++23': 'C++23',
-        'c90': "C90",
+        'c89': "C89",
         'c99': "C99",
         'c11': "C11",
         'c17': "C17",
@@ -140,6 +140,8 @@ export async function getProjectContext(uri: vscode.Uri, context: { flags: Recor
             return undefined;
         }
 
+        const originalStandardVersion = projectContext.result.standardVersion;
+
         formatChatContext(projectContext.result);
 
         const result: ProjectContext = {
@@ -160,6 +162,11 @@ export async function getProjectContext(uri: vscode.Uri, context: { flags: Recor
         if (projectContext.result.standardVersion) {
             telemetryProperties["standardVersion"] = projectContext.result.standardVersion;
         }
+        else {
+            if (originalStandardVersion) {
+                telemetryProperties["originalStandardVersion"] = originalStandardVersion;
+            }
+        }
         if (projectContext.result.targetPlatform) {
             telemetryProperties["targetPlatform"] = projectContext.result.targetPlatform;
         }

Extension/test/scenarios/SingleRootProject/tests/lmTool.test.ts

@@ -376,6 +376,7 @@ describe('CppConfigurationLanguageModelTool Tests', () => {
             property['language'] === undefined &&
             property['compiler'] === undefined &&
             property['standardVersion'] === undefined &&
+            property['originalStandardVersion'] === 'gnu++17' &&
             property['targetPlatform'] === undefined)));
         ok(result, 'result should not be undefined');
         ok(result.language === '');