Improve bulk Stix loader to support 100K+ relations loading in one bulk

[richard-julien]

Description

Improve bulk Stix loader to support 100K+ relations loading in one bulk.
The error is due to a nodejs limitation where function doesnt support more than 100K parameters. This limitation throw the error "Maximum call size exceeded" when we use spread operators to add result in the global accumulation array.

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Get a platform with lot of massive reports
2. Create a taxii sharing focus on reports
3. Consume the taxii collection

Expected Output

List of reports correctly exported.

Actual Output

Execution failure for "Maximum call size exceeded"

Additional information

Improvement is done with 2 different approaches.

1. Accumulate the result in a callback instead of spread the complete list at the end.
2. Improve nested connections internal filter to be based on query terms to prevent field explosions