Revert "build: do not build mksnapshot and mkcodecache for --shared"

This reverts commit 8cf8eb16.

Refs: https://github.com/nodejs/build/issues/1996

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines