Source Amazon Ads: Deprecate report_wait_timeout and report_generation_max_retries fields

[girarda]

Tell us about the problem you're trying to solve

The report_wait_timeout and report_generation_max_retries configuration fields for the Amazon Ads source are used to configure how long the connector will wait for the report to be generated, and how often we'll retry in case of failures.

Both of these concerns are implementation details the users shouldn't have to worry about. Setting the wait timeout too low can lead to on-call issues due to the endpoint being intermittently slow.

Describe the solution you’d like

We should set the default values of these two fields to the max allowed and remove the fields from the spec. This will lower the mental load on the user, and will make the connector more resistant to the endpoint being slow at times.