source-facebook-marketing: support multiple account ids

[Alex-Bair]

Description:

The main change in this PR is supporting multiple Facebook Marketing account IDs in a single connector. Multiple account IDs can be provided as comma separated values in the account_ids field. This change is backwards compatible with older configs that only have an account_id field.

The account ID is used in multiple locations throughout the connector, and many of the changes are for threading the account ID through all streams.

Supporting more than one account ID in the connector also means that streams need to retain a cursor per account ID. The various state management tools (get_updated_state, stream_slices, the state property, etc.) have been updated to retain a cursor value for each account ID.

Closes #2110

Workflow steps:

(How does one use this feature, and how has it changed)

Documentation links affected:

The source-facebook-marketing documentation should be updated to reflect that multiple account IDs are supported. The docs update PR will be linked here once it's ready.

Notes for reviewers:

Tested on a local stack with a single account ID and a recent start date (01NOV2024). Confirmed that:

• The same number of records are retrieved for all standard streams before and after these changes.
• Existing tasks switch over to use account_ids without error.
• Existing tasks' incremental streams pick up where they left off (i.e. cursor values are preserved through the switchover).

Spec and discover snapshot changes are expected due to adding support for multiple account IDs & updating the documentation URLs.

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This change is 

[williamhbaker]

LGTM