[GEN-1918]: add CRUD tests for instr. rules (#1943)

This pull request includes changes to improve the accessibility and
functionality of the frontend web application. The primary focus is on
ensuring CRUD operations for custom resources in the cluster.

### Cypress End-to-End Tests:
*
[`frontend/webapp/cypress/e2e/06-rules.cy.ts`](diffhunk://#diff-aba373cc082245b95ade17d84a085f3f05f6feccbc7d9ee511cb3cc6b4927dd6R1-R101):
Added tests for CRUD operations on instrumentation rules CRDs, ensuring
the cluster state is managed correctly.

These changes collectively enhance the application's accessibility,
testability, and ensure robust end-to-end testing for critical
functionalities.

frontend/webapp/cypress/e2e/06-rules.cy.ts

@@ -0,0 +1,101 @@
+import { ROUTES } from '../../utils/constants/routes';
+
+// The number of CRDs that exist in the cluster before running any tests should be 0.
+// Tests will fail if you have existing CRDs in the cluster.
+// If you have to run tests locally, make sure to clean up the cluster before running the tests.
+
+describe('Instrumentation Rules CRUD', () => {
+  const namespace = 'odigos-system';
+  const crdName = 'instrumentationrules.odigos.io';
+  const noResourcesFound = `No resources found in ${namespace} namespace.`;
+
+  beforeEach(() => {
+    cy.intercept('/graphql').as('gql');
+  });
+
+  it('Should create a CRD in the cluster', () => {
+    cy.visit(ROUTES.OVERVIEW);
+
+    cy.exec(`kubectl get ${crdName} -n ${namespace} | awk 'NR>1 {print $1}'`).then((crdListBefore) => {
+      expect(crdListBefore.stderr).to.eq(noResourcesFound);
+      expect(crdListBefore.stdout).to.eq('');
+
+      const crdIdsBefore = crdListBefore.stdout.split('\n').filter((str) => !!str);
+      expect(crdIdsBefore.length).to.eq(0);
+
+      cy.get('[data-id=add-entity]').click();
+      cy.get('[data-id=add-rule]').click();
+      cy.get('[data-id=modal-Add-Instrumentation-Rule]').should('exist');
+      cy.get('button').contains('DONE').click();
+
+      cy.wait('@gql').then(() => {
+        cy.exec(`kubectl get ${crdName} -n ${namespace} | awk 'NR>1 {print $1}'`).then((crdListAfter) => {
+          expect(crdListAfter.stderr).to.eq('');
+          expect(crdListAfter.stdout).to.not.be.empty;
+
+          const crdIdsAfter = crdListAfter.stdout.split('\n').filter((str) => !!str);
+          expect(crdIdsAfter.length).to.eq(1);
+        });
+      });
+    });
+  });
+
+  it('Should update the CRD in the cluster', () => {
+    cy.visit(ROUTES.OVERVIEW);
+
+    const node = cy.contains('[data-id=rule-0]', 'PayloadCollection');
+    expect(node).to.exist;
+    node.click();
+
+    cy.get('[data-id=drawer]').should('exist');
+    cy.get('button[data-id=drawer-edit]').click();
+    cy.get('input[data-id=title]').clear().type('Cypress Test');
+    cy.get('button[data-id=drawer-save]').click();
+    cy.get('button[data-id=drawer-close]').click();
+
+    cy.wait('@gql').then(() => {
+      cy.exec(`kubectl get ${crdName} -n ${namespace} | awk 'NR>1 {print $1}'`).then((crdList) => {
+        expect(crdList.stderr).to.eq('');
+        expect(crdList.stdout).to.not.be.empty;
+
+        const crdIds = crdList.stdout.split('\n').filter((str) => !!str);
+        expect(crdIds.length).to.eq(1);
+
+        cy.exec(`kubectl get ${crdName} ${crdIds[0]} -n ${namespace} -o json`).then((crd) => {
+          expect(crd.stderr).to.eq('');
+          expect(crd.stdout).to.not.be.empty;
+
+          const parsed = JSON.parse(crd.stdout);
+          const { spec } = parsed?.items?.[0] || parsed || {};
+
+          expect(spec).to.not.be.empty;
+          expect(spec.ruleName).to.eq('Cypress Test');
+        });
+      });
+    });
+  });
+
+  it('Should delete the CRD from the cluster', () => {
+    cy.visit(ROUTES.OVERVIEW);
+
+    const node = cy.contains('[data-id=rule-0]', 'PayloadCollection');
+    expect(node).to.exist;
+    node.click();
+
+    cy.get('[data-id=drawer]').should('exist');
+    cy.get('button[data-id=drawer-edit]').click();
+    cy.get('button[data-id=drawer-delete]').click();
+    cy.get('[data-id=modal]').contains('Delete rule').should('exist');
+    cy.get('button[data-id=approve]').click();
+
+    cy.wait('@gql').then(() => {
+      cy.exec(`kubectl get ${crdName} -n ${namespace} | awk 'NR>1 {print $1}'`).then((crdList) => {
+        expect(crdList.stderr).to.eq(noResourcesFound);
+        expect(crdList.stdout).to.eq('');
+
+        const crdIds = crdList.stdout.split('\n').filter((str) => !!str);
+        expect(crdIds.length).to.eq(0);
+      });
+    });
+  });
+});