[source-pinterest] Add an optional parameter to extract data for specific account ids

[karolur]

Currently, the Pinterest connector extracts data from all available account ids by default. This behavior poses challenges for our enterprise use cases where only specific account IDs need to be included and others need to be masked. I propose adding an optional configuration parameter (account_ids) to allow users to specify one or more account IDs to extract data from. If no account IDs are provided, the connector will continue to extract data for all accounts, maintaining backward compatibility.