Squash database migrations

squash database migrations into:

• one migration for all PHASE 1 products
• one migration per each product: site, router, and trunk

(instead of having three migrations for one product where they get changed a bunch of times)

gso/migrations/versions/2023-08-16_e68720f2ec32_add_ip_trunk_migration_workflow.py

-"""Add IP Trunk migration workflow.
-
-Revision ID: e68720f2ec32
-Revises: a6eefd32c4f7
-Create Date: 2023-08-16 14:48:00.227803
-
-"""
-import sqlalchemy as sa
-from alembic import op
-
-# revision identifiers, used by Alembic.
-revision = 'e68720f2ec32'
-down_revision = 'a6eefd32c4f7'
-branch_labels = None
-depends_on = None
-
-
-from orchestrator.migrations.helpers import create_workflow, delete_workflow
-
-new_workflows = [
-    {
-        "name": "migrate_iptrunk",
-        "target": "MODIFY",
-        "description": "Migrate an IP Trunk",
-        "product_type": "Iptrunk"
-    }
-]
-
-
-def upgrade() -> None:
-    conn = op.get_bind()
-    for workflow in new_workflows:
-        create_workflow(conn, workflow)
-
-
-def downgrade() -> None:
-    conn = op.get_bind()
-    for workflow in new_workflows:
-        delete_workflow(conn, workflow["name"])