Deprecate various nova resources

[nikParasyr]

Mark compute_floatingip_associate_v2, compute_floatingip_v2, compute_secgroup_v2 as deprecated. Add a deprecation message to point to the related neutron resources to be used instead. Move their doc pages into the Deprecated subcategory.

[kayrus]

LGTM, thanks!

[kayrus]

2024-01-05T13:53:18.2413059Z 2024-01-05T13:53:18.239Z [ERROR] sdk.proto: Response contains error diagnostic: diagnostic_summary="Error detaching openstack_compute_interface_attach_v2 f81329b4-0325-4629-ae34-21f7f311ce3a/1ef8227f-9f51-49f2-bc34-410e1153f675: couldn't find resource (21 retries)" tf_rpc=ApplyResourceChange tf_req_id=21d3df3d-73a3-c05b-9256-541a8841cb4d tf_provider_addr=registry.terraform.io/hashicorp/openstack tf_resour
ce_type=openstack_compute_interface_attach_v2 tf_proto_version=5.4 diagnostic_detail="" diagnostic_severity=ERROR
2024-01-05T13:53:18.2451898Z 2024-01-05T13:53:18.244Z [WARN]  sdk.helper_resource: Error running Terraform CLI command: test_terraform_path=/usr/local/bin/terraform
2024-01-05T13:53:18.2453227Z   error=
2024-01-05T13:53:18.2453624Z   | exit status 1
2024-01-05T13:53:18.2454003Z   | 
2024-01-05T13:53:18.2455772Z   | Error: Error detaching openstack_compute_interface_attach_v2 f81329b4-0325-4629-ae34-21f7f311ce3a/1ef8227f-9f51-49f2-bc34-410e1153f675: couldn't find resource (21 retries)
2024-01-05T13:53:18.2457276Z   | 
2024-01-05T13:53:18.2458452Z    test_step_number=2 test_working_directory=/tmp/plugintest3608714075 test_name=TestAccComputeV2InterfaceAttachImport_basic
2024-01-05T13:53:18.2461757Z 2024-01-05T13:53:18.244Z [DEBUG] sdk.helper_resource: Stopping providers: test_working_directory=/tmp/plugintest3608714075 test_name=TestAccComputeV2InterfaceAttachImport_basic test_terraform_path=/usr/local/bin/terraform test_step_number=2
2024-01-05T13:53:18.2464506Z 2024-01-05T13:53:18.245Z [ERROR] sdk.helper_resource: Error running post-test destroy, there may be dangling resources: test_terraform_path=/usr/local/bin/terraform
2024-01-05T13:53:18.2466022Z   error=
2024-01-05T13:53:18.2466437Z   | exit status 1
2024-01-05T13:53:18.2466824Z   | 
2024-01-05T13:53:18.2468917Z   | Error: Error detaching openstack_compute_interface_attach_v2 f81329b4-0325-4629-ae34-21f7f311ce3a/1ef8227f-9f51-49f2-bc34-410e1153f675: couldn't find resource (21 retries)
2024-01-05T13:53:18.2470490Z   | 
2024-01-05T13:53:18.2474058Z    test_step_number=2 test_working_directory=/tmp/plugintest3608714075 test_name=TestAccComputeV2InterfaceAttachImport_basic
2024-01-05T13:53:18.2475482Z     testing_new.go:85: Error running post-test destroy, there may be dangling resources: exit status 1
2024-01-05T13:53:18.2476438Z         
2024-01-05T13:53:18.2479609Z         Error: Error detaching openstack_compute_interface_attach_v2 f81329b4-0325-4629-ae34-21f7f311ce3a/1ef8227f-9f51-49f2-bc34-410e1153f675: couldn't find resource (21 retries)
2024-01-05T13:53:18.2481065Z         
2024-01-05T13:53:18.2481778Z --- FAIL: TestAccComputeV2InterfaceAttachImport_basic (219.46s)