Fix handling of git-authenticated npm dependencies being misdetected as aliases

[dikshaa2909]

Fixes #4753

Summary

Fix incorrect alias detection for git-authenticated npm dependencies.

Dependencies like:

"private-lib": "git+ssh://git@github.com:org/repo.git#v1.0.0"

were incorrectly treated as alias dependencies because the logic only checked for ":" and "@" in the requirement string.

This change excludes git-based URLs (git+, git:, git@, ssh://, http://, https://) from alias detection.

Changes

• Updated alias detection condition in:
  • BaseNpmHandler.update_dependencies_by_purl
  • deps_mapper
• Added test to ensure declared dependency name is preserved.

Tasks

• Reviewed contribution guidelines
• PR is descriptively titled and links the original issue
• Tests pass locally
• Feature branch created from develop
• Updated documentation (not applicable)
• Updated CHANGELOG (if required by maintainers)