Support meta information defined in templates repository

[o-orand]

Is your feature request related to a problem? Please describe.
As COA User, I want to leverage metadata defined in templates repository.

Describe the solution you'd like
Manifest generation step should use meta-inf.yml to interpolate values with spruce

[o-orand]

Closed by ee68358
Sample usage here:
Meta-inf (docs/reference_dataset/template_repository/meta-inf.yml)

cf-ops-automation/docs/reference_dataset/template_repository/meta-inf.yml

Lines 1 to 3 in ee68358

	meta-inf:
	status: enabled
	coa-version: latest

• bosh deployment:

  cf-ops-automation/docs/reference_dataset/template_repository/hello-world-root-depls/bosh-deployment-sample/template/bosh-deployment-sample-tpl.yml

  Line 3 in ee68358

  meta-inf-support: (( grab meta-inf.status ))

• cf app:

  cf-ops-automation/docs/reference_dataset/template_repository/hello-world-root-depls/cf-apps-deployments/generic-app/template/generic-app_manifest-tpl.yml

  Line 22 in ee68358

  meta-inf-support: (( grab meta-inf.status ))

• terraform :

  cf-ops-automation/docs/reference_dataset/template_repository/hello-world-root-depls/terraform-config/template/terraform-tpl.tfvars.yml

  Line 4 in ee68358

  meta-inf-support: "(( grab meta-inf.status ))"

• concourse pipeline:

  cf-ops-automation/docs/reference_dataset/template_repository/hello-world-root-depls/pipeline-sample/concourse-pipeline-config/pipeline-sample-tpl.yml

  Line 3 in ee68358

  meta-inf-support: (( grab meta-inf.status ))