API to configure report(s) in bulk for given a list of sites

**Is your feature request related to a problem? Please describe.**
Since we are using a phased approach for enabling auditing (specifically ahrefs-related) and reporting, we need an easy way non-engineers can configure reporting for sites or organizations, as they come into our pipeline.
Sometimes a customer can have tens of specific sites in an organization for which we need to enable reporting on a single channel, while for the rest of the sites reporting shouldn't be done. This requires us to perform tens of get - patch API calls manually.

**Describe the solution you'd like**
An API that, given:
- a list of sites (baseURLs, not encoded)
- organizationId
- list of report types
- slack channel ID and optionally user IDs
- byOrg or not
Configures reporting for all those sites accordingly.

**Describe alternatives you've considered**
Scripting that would actually do the same, but outside the API, and could be error-prone, like https://github.com/iuliag/spacecat-automation-tools

**Asks that could have been solved by the feature**
https://cq-dev.slack.com/archives/C05A45JBP9N/p1710871764208859

Start by reviewing the existing GET and PATCH reporting API operations referenced in the issue and the current site or organization configuration flow. Define the bulk request and verify that it applies the listed report types, Slack channel, optional users, and byOrg setting only to the supplied sites, with behavior matching the existing configuration APIs.

Written by the indexing model from the issue text.