lib: extract validateObject validator

[ZYSzys]

Pulls out the common argument validateObject validator to internal/validators.

BTW, there is inconsistent ERR_INVALID_ARG_TYPE via the object validation: object or Object, do we need to unify this error message ? Although this is so trivial :)

node/lib/path.js

Line 896 in 951b1c3

throw new ERR_INVALID_ARG_TYPE('pathObject', 'Object', pathObject);

node/lib/child_process.js

Line 408 in 951b1c3

throw new ERR_INVALID_ARG_TYPE('args', 'object', args);

Update: unify the error message by lowercase object(should be semver-major?)

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[mscdex]

FWIW this conflicts with #24913