Leverage secret scanning when it goes OSS

This was written to solve a customer need.

• https://gitlab.com/gitlab-com/customer-success/tools/sensitive_data/

And this was written for internal use (now OSS)

• https://gitlab.com/gitlab-com/gl-security/gl-redteam/token-hunter

It needs to be refined and improved but code could be leveraged to make secret detection more robust

Let's evaluate it