Allow mapping requests to install plugins

[Frassle]

Description

Enabling fix for pulumi/pulumi-terraform-bridge#1130

This adds two new bits of logic to the plugin mapper.

Firstly when getting a mapping request for a given package X, as well as searching to see if we have an X plugin already installed to call it's GetMapping method first, we now also try to install X if we don't already have it. The install failing is not considered an error, we'll just try the other plugins to see if they map and then possibly return empty (as before).

Secondly the converter can pass a hint to what the pulumi plugin for the ecosystem plugin is. If no hint is given we assume the pulumi plugin name is the same as the ecosystem name. But this can be used for example in the terraform converter to tell the engine that for example the terraform provider "azurerm" is called "azure" in pulumi.

The hint is just a hint, if the name doesn't match all the other plugins will be searched as before.

Checklist

• I have run make tidy to update any new dependencies
• I have run make lint to verify my code passes the lint check
  • I have formatted my code using gofumpt

• I have added tests that prove my fix is effective or that my feature works

• I have run make changelog and committed the changelog/pending/<file> documenting my change

• Yes, there are changes in this PR that warrants bumping the Pulumi Cloud API version

[pulumi-bot]

Changelog

[uncommitted] (2023-05-29)

Features

• [cli] The convert and import commands will try to install plugins needed for correct conversions.
  #13046

[Frassle]

This points to a small branch (https://github.com/pulumi/pulumi-terraform-bridge/tree/fraser/getMapping) to fix up that GetMapping now needs two parameters.

I'll ensure this gets pointed back to mainline once things are merged and propgated.

[Frassle]

This has just been moved up

[Frassle]

Wondering if "provider" here should be renamed something like "ecosystemProvider" "foreignProvider"?

[justinvp]

I'm ok with it as-is, but don't feel strongly about it.

[justinvp]

LGTM

[Frassle]

bors merge

[bors]

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