Reapply "Add NoCompression option to tarball compressor"

[mdzhigarov]

This PR adds a new method IsNonCompressedTarball to the Compressor interface to detect whether a file is a non-compressed tarball.

Changes

• Added IsNonCompressedTarball(path string) (bool, error) method to the Compressor interface
• Implemented the method in tarballCompressor using the native golang approach to inspect the tar contents
• Implemented the method in FakeCompressor returning false for testing purposes
• Added comprehensive unit tests covering:
  • Positive case: non-compressed tarball files
  • Negative cases: compressed tarballs and non-tarball files
  • Error handling: file command failures and execution errors

Testing

All existing tests pass and new unit tests provide comprehensive coverage of the new functionality.