Partially revert #2253

[rgmz]

Description:

An optimization introduced in PR #2253 inadvertently broke scanning of nested zip archives.

Based on my testing, this fixes #2378. The changes to pkg/sources/git/git.go might also need to be reverted.
https://github.com/trufflesecurity/trufflehog/pull/2253/files#diff-c2efdfa2e124674a8eaf026fee883e72f19914e765c7a99b72e4ead288bd1104

Alternatively, it's possible that this could be fixed by writing nested archives to disk instead of memory.

Checklist:

• Tests passing (make test-community)?
• Lint passing (make lint this requires golangci-lint)?

[bill-rich]

@ahrav How does this mesh with the #2253 changes?

[ahrav]

@ahrav How does this mesh with the #2253 changes?

I would've hoped it wouldn't affect it, but it appears it might. We might want to consider using our buffered file writer if we are writing large amount of data to memory otherwise we'll end up with OOM issues again.