fix: Reduce Firewall create and update e2e test flakiness (#9298)

* Click back into field to dismiss autocomplete popper

* Fix issue with LinodeSelectV2 label/text field association, update test to find input by label

* Clean up, click back into select field to dismiss autocomplete popper

* Find button within group to avoid selecting drawer title

* Offload interactions involving firewall creation to API

* Wait for firewall create requests

* Add intercepts and wait for Firewall update API requests to resolve

* Added changeset: Fix LinodeSelectV2 label association

* Fix flake involving Linode selection when capturing image

packages/manager/.changeset/pr-9298-fixed-1687455527847.md

@@ -0,0 +1,5 @@
+---
+"@linode/manager": Fixed
+---
+
+Fix LinodeSelectV2 label association ([#9298](https://github.com/linode/manager/pull/9298))

packages/manager/cypress/e2e/core/firewalls/create-firewall.spec.ts

@@ -33,8 +33,13 @@ describe('create firewall', () => {
         cy.findByText('Label is required.');
         // Fill out and submit firewall create form.
         containsClick('Label').type(firewall.label);
-        getClick('[data-testid="create-firewall-submit"]');
+        ui.buttonGroup
+          .findButtonByTitle('Create Firewall')
+          .should('be.visible')
+          .should('be.enabled')
+          .click();
       });
+    cy.wait('@createFirewall');
 
     // Confirm that firewall is listed on landing page with expected configuration.
     cy.findByText(firewall.label)
@@ -75,24 +80,27 @@ describe('create firewall', () => {
         .within(() => {
           // Fill out and submit firewall create form.
           containsClick('Label').type(firewall.label);
-          cy.get('[data-testid="textfield-input"]:last')
+          cy.findByLabelText('Linodes')
             .should('be.visible')
             .click()
             .type(linode.label);
-        });
 
-      ui.autocompletePopper
-        .findByTitle(linode.label)
-        .should('be.visible')
-        .click();
+          ui.autocompletePopper
+            .findByTitle(linode.label)
+            .should('be.visible')
+            .click();
 
-      ui.drawer
-        .findByTitle('Create Firewall')
-        .should('be.visible')
-        .within(() => {
-          getClick('[data-testid="create-firewall-submit"]');
+          cy.findByLabelText('Linodes').should('be.visible').click();
+
+          ui.buttonGroup
+            .findButtonByTitle('Create Firewall')
+            .should('be.visible')
+            .should('be.enabled')
+            .click();
         });
 
+      cy.wait('@createFirewall');
+
       // Confirm that firewall is listed on landing page with expected configuration.
       cy.findByText(firewall.label)
         .closest('tr')