chore(assertions): remove unnecessary condition for if statement in Template (#32028)

### Reason for this change



The following is the code in the `Template` constructor in the assertions module:

```ts
    if (!templateParsingOptions?.skipCyclicalDependenciesCheck ?? true) {
      checkTemplateForCyclicDependencies(this.template);
    }
```

However, since the left operand (`!templateParsingOptions?.skipCyclicalDependenciesCheck`) is never undefined (null), the right operand (`?? true`) should not be needed. And the `templateParsingOptions` is not optional arg.

### Description of changes



```diff
-    if (!templateParsingOptions?.skipCyclicalDependenciesCheck ?? true) {
+    if (!templateParsingOptions.skipCyclicalDependenciesCheck) {
      checkTemplateForCyclicDependencies(this.template);
    }
```

### Description of how you validated changes



A unit test.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: go-to-k

packages/aws-cdk-lib/assertions/lib/template.ts

@@ -54,7 +54,7 @@ export class Template {
 
   private constructor(template: { [key: string]: any }, templateParsingOptions: TemplateParsingOptions = {}) {
     this.template = template as TemplateType;
-    if (!templateParsingOptions?.skipCyclicalDependenciesCheck ?? true) {
+    if (!templateParsingOptions.skipCyclicalDependenciesCheck) {
       checkTemplateForCyclicDependencies(this.template);
     }
   }

packages/aws-cdk-lib/assertions/test/template.test.ts

@@ -1368,7 +1368,28 @@ describe('Template', () => {
     }).toThrow(/dependency cycle/);
   });
 
-  test('does not throw when given a template with cyclic dependencies if check is skipped', () => {
+  test('throws when given a template with cyclic dependencies if skipCyclicalDependenciesCheck is false', () => {
+    expect(() => {
+      Template.fromJSON({
+        Resources: {
+          Res1: {
+            Type: 'Foo',
+            Properties: {
+              Thing: { Ref: 'Res2' },
+            },
+          },
+          Res2: {
+            Type: 'Foo',
+            DependsOn: ['Res1'],
+          },
+        },
+      }, {
+        skipCyclicalDependenciesCheck: false,
+      });
+    }).toThrow(/dependency cycle/);
+  });
+
+  test('does not throw when given a template with cyclic dependencies if skipCyclicalDependenciesCheck is true', () => {
     expect(() => {
       Template.fromJSON({
         Resources: {