Add project-factory based data platform dataset to FAST project factory stage (#3957)

* dp rewrite stage 0, projects

* remove plan files

* generalize handling of basepath for projects in project-factory module

* central-0 ---> core-0

* add schemas, validate YAMLs, tags

* aspect types

* data catalog policy tag factory

* add support for data catalog taxonomy to project factory

* complete retrofit of old stage configuration, except networking

* shared vpc networking

* networking

* data platform as pf dataset

* docs

* test

* remove legacy dp stage, fix tests and links

* boilerplate

* tfdoc

* fix unrelated tfdoc

* schemas

* fix errors

* schema

* duplicate schemas

* yamllint

* Fix module naming convention for aspect-types

* Fix factories_config in vpcs.tf for net-vpc-factory compatibility

* Update schema documentation based on schema changes

* Fix false rename conflict in .config.yaml files

* Sync schemas and update documentation

* Fix path expansion for aspect-types and revert projects_input to master

* Restore path expansion for org_policies in projects-iam call

* Fix trailing newlines in schema duplicates to satisfy duplicate-diff

* Fix path expansion for data_catalog_taxonomy in taxonomies.tf

* Update inventory for data-platform test and clean up debug prints

* Add full values to data-platform inventory

* Align Stage 2 VPC Factory integration with Stage 0 and fix tests

TAG=agy

* Fix project factory context resolution and data platform datasets

- Update tag context keys in project factory to use file key without 'projects/' prefix.
- Fix tag reference in product-0.yaml.
- Fix shared_vpc_service_config in shared-0.yaml by moving service account to network_users.
- Set parent for domain-0 folder to data-platform.
- Mock net-dev-0 project ID in tests.
- Update inventories.

TAG=agy
CONV=4b37fa5b-bf59-4604-9e8f-b55353d967a0

* Fix project-level tag keys context resolution in project factory

* Fix commented out tag reference in domain-0 .config.yaml

* Fix merge() calls with empty arguments in project-factory and data-catalog-policy-tag

* Update Data Platform dataset README with prerequisites and customization guide

* Add Table of Contents to Data Platform dataset README

* docs: update Data Platform README with project templates tip

* Document data platform output files and linking sequence in README

* Update data platform README with VPC-SC and delegated IAM details

* Refactor data platform dataset and align stage defaults

* Update test inventory and variables for data platform with new prefix

.gitignore

@@ -32,3 +32,5 @@ node_modules
 fast/**/globals.auto.tfvars.json
 cloud_sql_proxy
 env/
+.jetskicli
+.agents