fix(sca): incorrect parsing of shebangs

[lyoung-confluent]

While working on wolfi-dev/os#19702 I noticed that the parsing of shebangs seems to struggle with some files:

2024/05/17 12:42:10 WARN Error reading shbang from usr/bin/fiologparser_hist.py: a shbang of only '/usr/bin/env' with multiple arguments (9 /usr/bin/env python3 """ Utility for converting *_clat_hist* files gene)

Source: https://github.com/axboe/fio/blob/3ed8eea0ee9b5d7de603e9b128e6c05941b99938/tools/hist/fiologparser_hist.py#L7

The parsing should terminate at the end of the line.

Functional Changes

• Use bytes.CutPrefix for better clarity
• Stop parsing at \n if present

SCA Changes

• Examining several representative APKs show no regression / the desired effect (details in notes)

Notes:

Linter

• The new check is clean across Wolfi
• The new check is opt-in or a warning

Notes: