Add support for DS_MAX_DEPTH

What does this MR do and why?

Describe in detail what your merge request does and why.

This MR modifies the default Dependency Scanning templates to search all directories for supported files. This will allow for setting DS_MAX_DEPTH which is a variable to be introduced in this MR: gitlab-org/security-products/analyzers/gemnasium!441 (merged)

Related Issue: Limit directory depth of Gemnasium scans (#292455 - closed)

Related Slack Conversation (internal only): https://gitlab.slack.com/archives/CKWHYU7U2/p1667257999012379

Testing

Smoke tests for this MR's templtes were done in: gitlab-org/security-products/tests/js-npm!13598 (closed)

• pipeline using the base template: gitlab-org/security-products/tests/js-npm@03a0a57f
• pipeline using the latest template: https://gitlab.com/gitlab-org/security-products/tests/js-npm/-/pipelines/690263161
• integration tests: gitlab-org/security-products/analyzers/gemnasium!440 (closed)

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MR acceptance checklist

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