[Chapel Merge] Updated the Curl module to use `sys_select` from t

Branch: refs/heads/main
Revision: 91d28d5
Author: jeremiah-corrado
Link: Fixing Curl tests broken by 'Sys' deprecation by jeremiah-corrado · Pull Request #20209 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #20209 from jeremiah-corrado/dep_sys_mod

Updated the Curl module to use sys_select from the runtime rather than POSIX.Select (A reversal of a change that was made erroneously in Deprecate the Sys module by jeremiah-corrado · Pull Request #20126 · chapel-lang/chapel · GitHub)

This should correct some recent nightly-test failures on library/packages/Curl/check-http and library/packages/Curl/check-http-setopt

Modified Files:
M modules/packages/Curl.chpl

Compare: https://github.com/chapel-lang/chapel/compare/c9da0d794b38...91d28d5dea72