TruffleRuby build definitions used to explicitly rely on `brew --prefix openssl@1.1` on macOS and abort installation if that was not found. However, this check didn't take into account that the user might have set OPENSSL_PREFIX in their environment, or that they have another `openssl@*` version installed via Homebrew. This change removes the `use_homebrew_openssl` check and allows TruffleRuby to perform its own OpenSSL detection.
https://github.com/oracle/truffleruby/blob/vm-23.1.0/lib/truffle/truffle/openssl-prefix.rb#L14-L17
* In TruffleRuby 23.1+, the GraalVM Updater (`gu`) is no longer available in GraalVM,
instead JVM Standalones and Maven artifacts are provided to replace `gu`.
* See https://github.com/oracle/graal/issues/6855
truffleruby+graalvm-dev currently delivers builds using both the latest Java and the latest Java LTS release as a base. Since the latest Java changes more frequently than the LTS release, using the LTS as a base helps prevent the URLs from growing stale.
