Fix FAST stages to support multi-tenant resman

[ZZelle]

The FAST stage 1-resman fails in a tenant for multiple reasons:

• it tries to create top level folders with the organization as parent instead of the local.root_node
• it uses the tag "project-factory" without creating it (it's done correctly without multi-tenancy)
• the stage 1-tenant-factory generates 0-bootstrap.auto.tfvars.json without some data required by 1-resman

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Checklist

I applicable, I acknowledge that I have:

• Read the contributing guide
• Ran terraform fmt on all modified files
• Regenerated the relevant README.md files using tools/tfdoc.py
• Made sure all relevant tests pass

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[juliocc]

@ZZelle can you check the linting issues and sign the CLA?

[ludoo]

Superseded by #2579