Adds the flag `--use-language-version-tools` to `pulumi install`. When
passed, and `pyenv` is installed, and a `.python-version` file is in the
project directory or any of its parent directories, Pulumi will install
the requested python version if it is not already installed.
`LanguageRuntime.InstallDependencies` now takes a struct
`InstallDependenciesRequest` as argument to make it easier to extend
this call with options.
See https://github.com/pulumi/pulumi-docker-containers/pull/232
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Co-authored-by: Thomas Gummerer <t.gummerer@gmail.com>