This commit adds a new language option for Python generation to specify
the package name instead of using `pulumi_x` where x is the name defined
in the schema.
A new test is added, and this has also been shown to produce no diff
when run against `pulumi-eks`.
* Import subpackages lazily
* Tighten up lazy_import impl
* Eagerly register resources, but lazily load their impl
* Add CHANGELOG entry
* Satisfy lint
* Restore mypy behavior so the change is not breaking
* Fix golden tests
This change adds schema and codegen support for plain properties which
are emitted typed as the plain type rather than wrapped as an `Input`.
Plain properties require a prompt value and do not accept a value that
is `Output`.
