Shopify source: add `Marketing Activities` stream

[topefolorunso]

Connector Name

source-shopify

❓ What

The Shopify connector does not currently pull any data around marketing activities, which is useful to track the marketing analytics and attribution.

📈 Impact

Users can utilize the Marketing Activities stream from Shopify

🤝 Proposed solution

Add a new stream Marketing Activities using the endpoints: https://shopify.dev/docs/api/marketing-activities/endpoints The properties should be split into top-level fields, similar to the implementation done for existing Hubspot streams.