fix(codewhisperer): Sometimes not show recommendation bug in new inline code path (#2909)

## Problem
Fix a critical bug that were introduced in f82944e

When changing the hover config in inlineCompletionService, a document text close event will be sent and received by the listener in activation.ts, which removed the recommendations.

This bug will make new inline completion not showing the recommendation if there is only one recommendation in paginated response.

No changelog item is needed for this fix.

## Solution
Let the doc close listener only remove recommendation when the closed file is the invocation file.

Author: leigaol

src/codewhisperer/activation.ts

@@ -174,6 +174,7 @@ export async function activate(context: ExtContext): Promise<void> {
         acceptSuggestion.register(context),
         // on text document close.
         vscode.workspace.onDidCloseTextDocument(e => {
+            if (isInlineCompletionEnabled() && e.uri.fsPath !== InlineCompletionService.instance.filePath()) return
             RecommendationHandler.instance.reportUserDecisionOfCurrentRecommendation(vscode.window.activeTextEditor, -1)
             RecommendationHandler.instance.clearRecommendations()
         }),

src/codewhisperer/service/inlineCompletionService.ts

@@ -191,6 +191,10 @@ export class InlineCompletionService {
         return (this.#instance ??= new this())
     }
 
+    filePath(): string | undefined {
+        return this.documentUri?.fsPath
+    }
+
     // These commands override the vs code inline completion commands
     // They are subscribed when suggestion starts and disposed when suggestion is accepted/rejected
     // to avoid impacting other plugins or user who uses this API