EnterpriseUpdateBudget has fields that are no longer in the "Update a budget" request schema #4698

The request body schema of "Update a budget" (PATCH /enterprises/{enterprise}/settings/billing/budgets/{budget_id}) no longer has budget_scope, budget_entity_name, budget_type, and budget_product_sku. The OpenAPI description at 066b825d (picked up by #4693) only has budget_alerting, budget_amount, expires_at, and prevent_further_usage, while the previous one at 642960c3 also had the four removed properties and user.

EnterpriseUpdateBudget still has the four fields, so since #4693 script/check-schema-fields.sh reports them on master:

WARN  github/enterprise_budgets.go:115: EnterpriseUpdateBudget.BudgetScope: Go field is not in the request body schema of any of its 1 operation(s)
WARN  github/enterprise_budgets.go:116: EnterpriseUpdateBudget.BudgetEntityName: Go field is not in the request body schema of any of its 1 operation(s)
WARN  github/enterprise_budgets.go:117: EnterpriseUpdateBudget.BudgetType: Go field is not in the request body schema of any of its 1 operation(s)
WARN  github/enterprise_budgets.go:118: EnterpriseUpdateBudget.BudgetProductSKU: Go field is not in the request body schema of any of its 1 operation(s)

Also, both budget request types are missing properties that are in the schema:

• EnterpriseCreateBudget has no user (required when budget_scope is user) and no expires_at.
• EnterpriseUpdateBudget has no expires_at.

I have a fix ready and will open a PR.