* chore: runs v2 upgrade cmd
* chore: moves all files into the internal provider dir
* feat: migrates main and provider
* fix: migrates tests to provider factories
* fix: replace import state passthrough ctx func
* chore: bump tf-sdk to v2.4.4
* fix: acc test by adding stop grace period
* fix: move to validate diag functions
* test: switch from ctx TODO to Background
* feat: add state upgrade for restart_policy and auth
Co-authored-by: Shunsuke Suzuki <suzuki-shunsuke@users.noreply.github.com>
