GCP Service Account Credential as docker env variable for cloud scanner

[shyam0904a]

[+] Added support for passing in Service Account Key Credential content as base64 encoded env variable.
[+] Does this break anything : No, All existing functionality works.

data "google_client_config" "current" {}

resource "google_project_service" "cloud_resource_manager" {
  project = ""
  service = "cloudresourcemanager.googleapis.com"
  disable_on_destroy = false
}

module "cloud_scanner_example_multiple_project" {
  source                   = "deepfence/cloud-scanner/gcp//examples/gce-vm"
  version                  = "0.8.0"
  # gcp service account name
  name                     = "deepfence-cloud-scanner"
  # project_id example: dev1-123456
  project_id               = ""
  # org mode for multiple projects
  isOrganizationDeployment = true
}

resource "google_service_account_key" "cloud_scanner_key" {
  service_account_id = module.cloud_scanner_example_multiple_project.service_account_email
}

output "service_account_email" {
  value = module.cloud_scanner_example_multiple_project.service_account_email
}

output "service_account_key" {
  value     = google_service_account_key.cloud_scanner_key.private_key
  sensitive = true
}