Update Smoketest codegen to be endpoint param aware (#3836)

## Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here -->
Smoketests for service were failing because the smoke test assumed that
`use_dual_stack` would be present. But the service's endpoint rules did
not use that bulit-in so it was not.

## Description
<!--- Describe your changes in detail -->
Check if the service actually uses the fips or dual stack built-ins
before adding them to the test.

## Testing
<!--- Please describe in detail how you tested your changes -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->
Did not add tests for this because the current `SmokeTestsDecoratorTest`
isn't actually working and fixing it is going to be a bit of work. Want
to get this in to unblock customer ASAP and will go back and update the
tests once they are unblocked.

## Checklist
<!--- If a checkbox below is not applicable, then please DELETE it
rather than leaving it unchecked -->
- [x] For changes to the smithy-rs codegen or runtime crates, I have
created a changelog entry Markdown file in the `.changelog` directory,
specifying "client," "server," or both in the `applies_to` key.

----

_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

---------

Co-authored-by: ysaito1001 <awsaito@amazon.com>