devel/py-oci: Update to 2.7.0

• Support for maintenance windows on autonomous databases in the Database service
• Support for getting the compute units (OCPUs) of an Exadata autonomous transaction processing - dedicated resource in the Database service
• Create database home from VM_CLUSTER_BACKUP is removed from Database Service

PR: 242282
Submitted by: maintainer
Relnotes: https://github.com/oracle/oci-python-sdk/releases/tag/v2.7.0