Move prelaunch_octavia_workload default definition to common_defaults

Its default value was defined in dataplane_adoption defaults file,
but it was used by the development_environment role too.

Author: eduolivares

tests/roles/common_defaults/defaults/main.yaml

@@ -224,6 +224,10 @@ pull_openstack_configuration_ssh_shell_vars: |
 enable_octavia: true
 octavia_adoption: true
 
+# Whether to create Octavia workload before adoption - defined in common_defaults because it is used in two roles:
+# dataplane_adoption and development_environment
+prelaunch_octavia_workload: false
+
 # MariaDB client connection timeout in seconds
 # Related to OSPRH-18618
 mariadb_client_timeout: 0

tests/roles/dataplane_adoption/defaults/main.yaml

@@ -232,7 +232,6 @@ skip_patching_ansibleee_csv: false
 os_diff_dir: tmp/os-diff
 os_diff_data_dir: tmp/os-diff
 prelaunch_test_instance: true
-prelaunch_octavia_workload: false
 telemetry_adoption: true
 
 # nodes data will be templated in as a separate