test: skip some IBM i unsupported test cases

Issuing a shutdown() on IBM i PASE with parameter SHUT_WR
also sends a normal close sequence to the partner program.
This leads to timing issues and ECONNRESET failures in some
test cases.
Refs: https://github.com/libuv/libuv/pull/2782

PR-URL: https://github.com/nodejs/node/pull/34118


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>