test: use descriptive names for regression tests

Rename the tests appropriately alongside mentioning the subsystem.
Also, make a few basic changes to make sure the tests conform to the
standard test structure.

- Rename test-regress-GH-9819 to test-crypto-tostring-segfault
- Rename test-regress-GH-5051 to test-http-addrequest-localaddress
- Rename test-regress-GH-5727 to test-net-listen-invalid-port
- Rename test-regress-GH-5927 to test-tty-stdin-pipe
- Rename test-regress-GH-6235 to test-v8-global-setter

PR-URL: https://github.com/nodejs/node/pull/19275
Refs: https://github.com/nodejs/node/issues/19105


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>