Update terraform to 1.0.0

I would assume that to make this update we need to:

Set the required terraform version to ">= 1.0.0" in all examples
```
terraform {
required_version = ">= 1.0.0"
}
```

Change CI definitions to use Terraform >= 1.0.0

https://github.com/ContainerSolutions/terraform-examples/blob/main/.github/workflows/main.yml

here for tflint:

- name: Terraform Validate
uses: terraform-linters/setup-tflint@v1
with:
  tflint_version: v0.28.0 # Must be specified. See: https://github.com/terraform-linters/tflint/releases for latest versions

Providers* CI jobs uses the Terraform version included in the ubuntu-latest runner:

ProvidersAWS:
concurrency: provider_test_aws
needs: [TFLint, TFValidate, Checks]
runs-on: ubuntu-latest
steps:
- name: Check out repository code
uses: actions/checkout@v2
with:
  fetch-depth: 0   # Need whole history, or at least far enough back to get .test_log.log reference
- name: Setup TFLint
uses: terraform-linters/setup-tflint@v1
- name: Inject slug/short variables
uses: rlespinasse/github-slug-action@v3.x
- name: Run AWS examples
env:
  AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
  AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
  CI_USE_TF_CLOUD: true
  TERRAFORM_CLOUD_LOGIN_TOKEN: ${{ secrets.TERRAFORM_CLOUD_LOGIN_TOKEN }}
if: github.ref == 'refs/heads/main' || env.GITHUB_REF_SLUG == 'integration' # Only run on main/integration, as these take a long time
run: ${{ github.workspace }}/bin/run_aws_examples.sh

Docs:

- https://www.terraform.io/docs/language/settings/index.html#specifying-a-required-terraform-version
- https://www.terraform.io/docs/language/expressions/version-constraints.html
- a) For TFLint:
- https://github.com/terraform-linters/setup-tflint
- https://github.com/terraform-linters/tflint/releases
- b) For Terraform:
- https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners
- https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-README.md
- c) For Terraform with hashicorp/setup-terraform action:
- https://github.com/marketplace/actions/hashicorp-setup-terraform
- https://github.com/hashicorp/setup-terraform

ContainerSolutions / terraform-examples

Update terraform to 1.0.0 #46