Configure the Environment.mwaa resource and add an example

[turkenf]

Description of your changes

This PR adds aws_mwaa_environment resource.

Fixes #1093

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Manually:

NAME                                                       SYNCED   READY   EXTERNAL-NAME              AGE
environment.mwaa.aws.upbound.io/example-environment-test   True     True    example-environment-test   3h1m

Uptest: https://github.com/crossplane-contrib/provider-upjet-aws/actions/runs/9882342716

[turkenf]

/test-examples="examples/mwaa/v1beta1/environment.yaml"

[turkenf]

/test-examples="examples/mwaa/v1beta1/environment.yaml"

[turkenf]

As far as I can see from the logs, the import test of some dependent resources failed due to the id change. That's why I disable the import test of resources other than the Environment.mwaa resource.

[turkenf]

/test-examples="examples/mwaa/v1beta1/environment.yaml"

[turkenf]

/test-examples="examples/mwaa/v1beta1/environment.yaml"

[mergenci]

Thanks @turkenf. LGTM.