Feature for uploading JTAF providers to a custom registry

[chrismarget-j]

This PR introduces scripts and tool dependencies for publishing JTAF providers to a custom terraform registry.

The big moving parts are:

• a terraform registry running in AWS lambda/dynamodb/S3 currently running at tf-registry.click
• a side-effect/tool import of goreleaser
• a side-effect/tool import of lambda-tf-registry
• some scripts which hold it all together

What it does:

• compile, package and sign terraform binaries for a variety of os and architecture combinations (goreleaser, gpg)
• upload the artifacts to our S3 bucket, add links, checksums, signatures to the registry's database and print a usage statement (lambda-tf-registry's register command)

How to use it:

• set up aws credentials with the appropriate permissions in your environment
• build a JTAF provider in the usual way
• cd terraform-providers
• run make release
• reference tf-registry.click/juniper/jtafXYZ123 in a terraform config file to automatically fetch the appropriate binary

Other considerations:

• requires go 1.22, make and gpg