Remove the need to specify api/ files, pull directly from the DCL

[modular-magician]

Fixes #8201

This PR removes the need to specify api/ files for resources (although not samples quite yet) and pulls them directly off of the DCL's exported YAMLs. This means we'll stay up-to-date for better or for worse, although generally for the better. There's some pain in the upgrade- our YAMLs had drifted, and there were some dangerous-to-apply updates last I checked.

Changes are contained to main.go, and all other changes in the PR are non-functional (removing api files, removing old overrides)

Marked as WIP because of the drift- we need to resolve those to compatible before we can merge this. Outstanding issues:

• CloudBuild WorkerPool bad name description: b/200841783
• CloudBuild WorkerPool update: b/199915504
• CloudBuild WorkerPool WorkerConfig O+C: cl/399473374
• Dataproc WorkflowTemplate: b/199937950
• Dataproc WorkflowTemplate version: Update Dataproc WorkflowTemplate, rename REQUIRED_OVERRIDE GoogleCloudPlatform/magic-modules#5249
• EventArc Trigger descriptions: cl/396655269
• GKEHub Feature config_membership going required: Not believed to be a problem, as the field is effectively required already
• GKEHub FeatureMembership typo: Fixed upstream, will be picked up after merging with Add make command to upgrade DCL, use it to see if it works. GoogleCloudPlatform/magic-modules#5201
• GKEHub FeatureMembership configmanagement/location/feature/membership going required: Not believed to be a problem, same as for Feature
• PrivateCA CertificateTemplate losing state hint: Spoke with Nat, not believed to be a problem

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

gke_hub: made the `config_membership` field in `google_gke_hub_feature` required, disallowing invalid configurations

gke_hub: made the `configmanagement`, `feature`, `location`, `membership` fields in `google_gke_hub_feature_membership` required, disallowing invalid configurations

eventarc: added support for `uid` output field, `cloud_function` destination to `google_eventarc_trigger`

gke_hub: added support for `resource_state`, `state` outputs to `google_gke_hub_feature`

gke_hub: added support for `gcp_service_account_email` when configuring Git sync in `google_gke_hub_feature_membership`

Derived from GoogleCloudPlatform/magic-modules#5197

[github-actions]

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