fix: use parent from the location not from the datatype

[cfabianski]

Description

We were using only 1 context per custom detection / datatype while the context should be at the location level

Also removing the datatype detection in the risk as they would basically be duplicated

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format

[swarmia]

✅  Linked to AMA-3300 · Incorrect code extract for session and cookies policies
➡️  Part of AMA-2947 · OSS - Curio CLI

[elsapet]

🙏

[elsapet]

@spdawson FYI once this PR is merged, we should be able to get the code extract (i.e. parent context) for the SMTP risks :)