test: rename regression tests file names

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-io-1068 to test-tty-stdin-end
- Rename test-regress-GH-io-1811 to test-zlib-kmaxlength-rangeerror
- Rename test-regress-GH-node-9326 to test-kill-segfault-freebsd
- Rename test-timers-regress-GH-9765 to test-timers-setimmediate-infinite-loop
- Rename test-tls-pfx-gh-5100-regr to test-tls-pfx-authorizationerror
- Rename test-tls-regr-gh-5108 to test-tls-tlswrap-segfault

PR-URL: https://github.com/nodejs/node/pull/19332
Fixes: https://github.com/nodejs/node/issues/19105


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>