Go rewrite tgc handwritten files

[modular-magician]

There are not diffs when running the command locally.

Steps to test tgc provider locally:

1. Remove the generated files from terraform-google-conversion by running the command

rm -rf tfplan2cai/ancestrymanager; rm -rf tfplan2cai/converters/google; rm -rf tfplan2cai/test

2. Generate the tgc provider from magic-modules and no files are missing in terraform-google-conversion

cd mmv1;
go run . --version beta --output $GOPATH/src/github.com/GoogleCloudPlatform/terraform-google-conversion/tfplan2cai --provider  tgc

Steps to test tgc cai2hcl provider locally:

1. Remove the generated files from terraform-google-conversion by running the command

rm -rf cai2hcl

2. Generate the tgc provider from magic-modules and no files are missing in terraform-google-conversion

cd mmv1;
go run . --version beta --output $GOPATH/src/github.com/GoogleCloudPlatform/terraform-google-conversion/cai2hcl --provider  tgc_cai2hcl

Release Note Template for Downstream PRs (will be copied)

Derived from GoogleCloudPlatform/magic-modules#11768