fix(sns): sns subscription filter policy condition limit should be 150 (#24269)

The [Filter policy constraints docs](https://docs.aws.amazon.com/sns/latest/dg/subscription-filter-policy-constraints.html) says:

> For the complexity of the filter policy, the total combination of values must not exceed 150. Calculate the total combination by multiplying the number of values in each array.

This PR sets the complexity limit to the correct value.

----

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

Author: eliasbrange

packages/@aws-cdk/aws-sns/lib/subscription.ts

@@ -112,8 +112,8 @@ export class Subscription extends Resource {
 
       let total = 1;
       Object.values(this.filterPolicy).forEach(filter => { total *= filter.length; });
-      if (total > 100) {
-        throw new Error(`The total combination of values (${total}) must not exceed 100.`);
+      if (total > 150) {
+        throw new Error(`The total combination of values (${total}) must not exceed 150.`);
       }
     }
 

packages/@aws-cdk/aws-sns/test/subscription.test.ts

@@ -256,7 +256,7 @@ describe('Subscription', () => {
 
   });
 
-  test('throws with more than 100 conditions in a filter policy', () => {
+  test('throws with more than 150 conditions in a filter policy', () => {
     // GIVEN
     const stack = new cdk.Stack();
     const topic = new sns.Topic(stack, 'Topic');
@@ -269,9 +269,9 @@ describe('Subscription', () => {
       filterPolicy: {
         a: { conditions: [...Array.from(Array(2).keys())] },
         b: { conditions: [...Array.from(Array(10).keys())] },
-        c: { conditions: [...Array.from(Array(6).keys())] },
+        c: { conditions: [...Array.from(Array(8).keys())] },
       },
-    })).toThrow(/\(120\) must not exceed 100/);
+    })).toThrow(/\(160\) must not exceed 150/);
 
   });