test: remove test-gc-http-client from status file

test-gc-http-client is no longer believed to be unreliable. Remove it's
entry indicating it's flaky from the status file.

Closes: https://github.com/nodejs/node/issues/22336

PR-URL: https://github.com/nodejs/node/pull/28130


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>