Some test cases fail when the node executable is built by --shared #18535

When use --shared option in configure, it would build the node in shared lib for people who embed node in their applications. It also uses the node_main.cc to build the node executable with the shared lib. When using this executable to run our existing test suites, the following test cases fail:

Ubuntu 16.04:

• parallel/test-child-process-fork-exec-path
• parallel/test-module-loading-globalpaths
• parallel/test-postmortem-metadata
• parallel/test-process-external-stdio-close
• parallel/test-process-external-stdio-close-spawn
• parallel/test-stdout-close-catch
• abort/test-abort-backtrace

Maybe some of them are not suitable for shared lib build, maybe some are bugs. Fixing them would help us to have a CI job to build node in shared lib and verify it. This would also help embedding users to make sure the shared lib work. And we can start from Linux platform.

• Platform: Linux
• Subsystem: test