Prevent pwsh suggest when pasting

Fixes microsoft#210403

Author: Tyriar

src/vs/workbench/contrib/terminalContrib/suggest/browser/terminalSuggestAddon.ts

@@ -379,10 +379,10 @@ export class SuggestAddon extends Disposable implements ITerminalAddon, ISuggest
 	}
 
 	handleNonXtermData(data: string): void {
-		this._handleTerminalInput(data);
+		this._handleTerminalInput(data, true);
 	}
 
-	private _handleTerminalInput(data: string): void {
+	private _handleTerminalInput(data: string, nonUserInput?: boolean): void {
 		if (!this._terminal || !this._enableWidget || !this._terminalSuggestWidgetVisibleContextKey.get()) {
 			// HACK: Buffer any input to be evaluated when the completions come in, this is needed
 			// because conpty may "render" the completion request after input characters that
@@ -452,7 +452,7 @@ export class SuggestAddon extends Disposable implements ITerminalAddon, ISuggest
 			}
 
 			// Hide and clear model if there are no more items
-			if (!this._suggestWidget?.hasCompletions()) {
+			if (!this._suggestWidget?.hasCompletions() || !nonUserInput) {
 				this._additionalInput = undefined;
 				this.hideSuggestWidget();
 				// TODO: Don't request every time; refine completions