Fixed the generate script logic for notebook wizards. (#13418)

* Fixed the generate script logic for notebook wizards.

* -reverted previous changes
-added last page check to the page validation change logic.

* checking if the page is valid when entering it.

* removing unnecessary index variable in forEach loop

* added comments for generate script button enabling on notebookwizard page.

extensions/resource-deployment/src/ui/notebookWizard/notebookWizardPage.ts

@@ -100,6 +100,12 @@ export class NotebookWizardPage extends ResourceTypePage {
 			await setModelValues(this._model.inputComponents, this.wizard.model);
 		}
 
+		/**
+		 * Enabling or disabling the generate script button based on page validity.
+		 * Since it is a shared button, we have to run this logic every time the user enters the page to reflect the current page status.
+		 */
+		this.wizard.wizardObject.generateScriptButton.enabled = this.pageObject.valid;
+
 		this.wizard.wizardObject.registerNavigationValidator((pcInfo) => {
 			this.wizard.wizardObject.message = { text: '' };