chore(cli): raise the timeout for the bootstrap test (#14740)

The test case "upgrade legacy bootstrap stack to new bootstrap stack
while in use" has been observed to intermittently timeout. The standard
timeout of 10 minutes seems insufficient.

The cause seems to be CloudFormation, which in some cases, sits there
during an update for 10ish minutes perceivably doing nothing.

Example (account: 416588550161):
https://eu-west-2.console.aws.amazon.com/cloudformation/home?region=eu-west-2#/stacks/events?stackId=arn%3Aaws%3Acloudformation%3Aeu-west-2%3A416588550161%3Astack%2Fcdktest-07s3iezgzhzv-bootstrap-stack%2Fb38a15d0-b750-11eb-8ba6-0a290e8f7d04

Raise the timeout to 1 hour.


----

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

packages/aws-cdk/test/integ/cli/bootstrapping.integtest.ts

@@ -54,7 +54,8 @@ integTest('upgrade legacy bootstrap stack to new bootstrap stack while in use',
       '--force',
     ],
   });
-}));
+}), 3_600_000, // Observed in eu-west-2 that CF update takes over 10 minutes for this test.
+);
 
 integTest('can and deploy if omitting execution policies', withDefaultFixture(async (fixture) => {
   const bootstrapStackName = fixture.bootstrapStackName;

packages/aws-cdk/test/integ/helpers/test-helpers.ts

@@ -9,8 +9,11 @@ export type TestContext = { readonly output: NodeJS.WritableStream; };
 /**
  * A wrapper for jest's 'test' which takes regression-disabled tests into account and prints a banner
  */
-export function integTest(name: string,
-  callback: (context: TestContext) => Promise<void>) {
+export function integTest(
+  name: string,
+  callback: (context: TestContext) => Promise<void>,
+  timeoutMillis?: number,
+) {
 
   // Integ tests can run concurrently, and are responsible for blocking themselves if they cannot.
   const runner = shouldSkip(name) ? test.skip : test.concurrent;
@@ -36,7 +39,7 @@ export function integTest(name: string,
         process.stderr.write('✅');
       }
     }
-  });
+  }, timeoutMillis);
 }
 
 function shouldSkip(testName: string) {