Update FURL integ test to test invoke

[hawflau]

Issue #, if available:
N/A

Description of changes:
Update FURL integration test to test invoke the created Lambda Function

Description of how you validated changes:
Running the updated tests from my laptop

Checklist:

• Add/update unit tests using:
  • Correct values
  • Bad/wrong values (None, empty, wrong type, length, etc.)
  • Intrinsic Functions
• Add/update integration tests
• make pr passes
• Update documentation
• Verify transformed template deploys and application functions as expected
• Do these changes include any template validations?
  • Did the newly validated properties support intrinsics prior to adding the validations? (If unsure, please review Intrinsic Functions before proceeding).
    • Does the pull request ensure that intrinsics remain functional with the new validations?

Examples?

Please reach out in the comments, if you want to add an example. Examples will be
added to sam init through https://github.com/awslabs/aws-sam-cli-app-templates/

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

[mndeveci]

Why we needed boto version bump here? In order to support a new parameter to lambda_client.invoke?

[hawflau]

It was a miss from the FURL PR actually, as the FURL integration test is using lambda_client.get_function_url_config, which is only available in boto3 1.22.15 or above