Rajul/dv360 add to list device and contact info actions

[rvadera12]

A summary of your pull request, including the what change you're making and why.

Testing

Include any additional information about the testing you have completed to
ensure your changes behave as expected. For a speedy review, please check
any of the tasks you completed below during your testing.

• Added unit tests for new functionality
• Tested end-to-end using the local server
• [Segmenters] Tested in the staging environment

[github-actions]

New required fields detected

Warning

Your PR adds new required fields to an existing destination. Adding new required settings/mappings for a destination already in production requires updating existing customer destination configuration. Ignore this warning if this PR is for a new destination with no active customers in production.

The following required fields were added in this PR:

• Destination: Display and Video 360 (Actions), Settings:
• Destination: Display and Video 360 (Actions), Action:addToAudience, Fields:enable_batching,external_audience_id
• Destination: Display and Video 360 (Actions), Action:removeFromAudience, Fields:enable_batching,external_audience_id
• Destination: First Party Dv360, Action Field(s):enable_batching,external_audience_id
• Destination: First Party Dv360, Action Field(s):enable_batching,external_audience_id

Add these new fields as optional instead and assume default values in perform or performBatch block.