Only build config and packaging on Linux

[wptestyyh]

Type

• Bug fix
• Feature addition
• Feature update
• Documentation
• Build Infrastructure

Side Effects

• Breaking change
• Non-functional change

Goals

Don't build config and packaging on Windows since they are not needed on Windows

Technical Details

None

Test Results

• Linux build succeeds

Reviewer Focus

None

Future Work

• Ingest this change on Windows and check how the build on Windows works

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.