Fix s3 integration error handling

[deanhannigan]

Description

The default behaviour for handling integration errors is to throw the error and have koa relay it as a 400.
If an error object thrown by an integration contains a statusCode, koa will ignore the 400 and use that instead.

In development, if you encountered a permission restriction with your S3 integration, the AWS client would return a 403 and log you out. In prod, the page you were on would reload and you would lose the error message.

All errors in the S3 integration throw a new instance of Error with any relevant messaging. This will then be relayed with the default 400 status.

Addresses

• When creating and testing query in the S3 connector the builder crashes/reloads #14935

Launchcontrol

S3 integration error handling updated

[qa-wolf]

QA Wolf here! As you write new code it's important that your test coverage is keeping up.
Click here to request test coverage for this PR!

[aptkingston]

LGTM but will let someone from firestorm review too.