Migration to fixup bridge imports

[blampe]

Supersedes pulumi/pulumi-upgrade-provider-action#34.

Adds a migration to update imports to point at new paths introduced by pulumi/pulumi-terraform-bridge#2480 (after that's released).

[iwahbe]

Lets give it a shot.

[danielrbradley]

Happy with this in principle.

Have you tested this on a handful of providers locally already?

We should probably have a way of tracking a migration roll-out and flagging any issues.

[blampe]

Have you tested this on a handful of providers locally already?

Tested locally as well as on pulumi/pulumi-gcp#2593 pulumi/pulumi-datadog#683 pulumi/pulumi-cloudflare#955 pulumi/pulumi-random#1345 (I also tried AWS a few times before realizing Anton had already migrated it :)).

We should probably have a way of tracking a migration roll-out and flagging any issues.

@danielrbradley not sure if there's a better way to track, but there are currently 34 uses of the deprecated pf module which we expect to go to zero. I can kick off an "update workflows" actions and then see where things stand after those PRs have had a chance to merge.
https://github.com/search?q=org%3Apulumi+path%3Ago.mod+%22github.com%2Fpulumi%2Fpulumi-terraform-bridge%2Fpf+%22&type=code