[ML] Anomaly Detection: Fix test to reflect model memory limit change. (#65967)

Adapt jest test mocks to consider update introduced in #65652.

Author: walterra

x-pack/plugins/ml/server/models/job_validation/job_validation.test.ts

@@ -14,6 +14,13 @@ const callWithRequest: APICaller = (method: string) => {
     if (method === 'fieldCaps') {
       resolve({ fields: [] });
       return;
+    } else if (method === 'ml.info') {
+      resolve({
+        limits: {
+          effective_max_model_memory_limit: '100MB',
+          max_model_memory_limit: '1GB',
+        },
+      });
     }
     resolve({});
   }) as Promise<any>;
@@ -291,7 +298,7 @@ describe('ML - validateJob', () => {
   });
 
   // Failing https://github.com/elastic/kibana/issues/65865
-  it.skip('basic validation passes, extended checks return some messages', () => {
+  it('basic validation passes, extended checks return some messages', () => {
     const payload = getBasicPayload();
     return validateJob(callWithRequest, payload).then(messages => {
       const ids = messages.map(m => m.id);
@@ -305,7 +312,7 @@ describe('ML - validateJob', () => {
   });
 
   // Failing https://github.com/elastic/kibana/issues/65866
-  it.skip('categorization job using mlcategory passes aggregatable field check', () => {
+  it('categorization job using mlcategory passes aggregatable field check', () => {
     const payload: any = {
       job: {
         job_id: 'categorization_test',
@@ -372,7 +379,7 @@ describe('ML - validateJob', () => {
   });
 
   // Failing https://github.com/elastic/kibana/issues/65867
-  it.skip('script field not reported as non aggregatable', () => {
+  it('script field not reported as non aggregatable', () => {
     const payload: any = {
       job: {
         job_id: 'categorization_test',