Make TGC go.mod & go.sum files be controlled by MMv1

[SarahFrench]

Background

The process of upgrading the Go version used by the providers (+ other dependent tools) has required making edits in lots of places, across multiple repos.

This issue was about making .go-version files in TPG/TPGB controllable from MM, so that the PRs for the upgrade didn't need to be coordinated between MM/TPG/TPB.

Currently you still need to make a PR into TGC for the equivalent task, e.g. : GoogleCloudPlatform/terraform-google-conversion#1732

What kind of contribution is this issue about?

• TGC

Related PR(s), if any:

• Make .go-version files in TPG and TPGB be controlled by Magic Modules #16641 (comment)

Details

This work is blocked by the rework of the MMv1 code generator.

[SarahFrench]

The Go-rewrite of the code generator has unblocked this, and has hopefully made this task easier!

Also to add, the main benefit of making TGC's go.mod file be controlled from MM is that it'll make the process of updating the Go version much easier.