Use strings.Builder instead of raw slices. We could go further here and
collapse to a single, ~right-sized bulder at the cost of complexity in
the `stateAcronym -> stateLowerOrNumber` transition.
Also, eliminate the pyName function, as it is redundant.
In particular, ensure that they are keyword-safe. This affects
`aws:lambda:*` in particular: prior to these changes, we were generating
code into `pulumi_aws.lamdba`, which is not referencable due to its use
of the `lamdba` keyword. With these changes, we generate code into
`pulumi_aws.lambda_`.
There is also a small fix for multi-line non-formatted strings: these
strings do not need escaped braces.
Fixes: #2151
This will allow us to be able to share the code that generates our
language providers. Currently there is a copy of the python code
generation in pulumi-kubernetes and also in pulumi-terraform
We want to be able to share these
