feat(runner-rust): add perl deps for vendored OpenSSL musl builds

Static x86_64-unknown-linux-musl builds that use the openssl crate's
`vendored` feature compile OpenSSL from source; its Configure script needs
Time::Piece, IPC::Cmd, FindBin and Pod::Html, which the minimal
perl-interpreter does not provide. Bake them into the rust runner (and, via
FROM, the rpm runner) so workflows like cichlid's release don't have to
dnf-install build deps at job time.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KLzpDUMcQg8KWBdTpw61eb

images/runner-rust/Containerfile

@@ -7,10 +7,20 @@ ARG SCCACHE_VERSION=0.15.0
 # identical 1.96.0 commit), and Fedora packages no musl std — so a static
 # x86_64-unknown-linux-musl build is impossible with the packaged toolchain.
 # rustup gives a toolchain whose musl std is built by the very same rustc.
+#
+# The perl-* packages are required by the openssl crate's `vendored` feature,
+# which builds OpenSSL from source for static musl binaries: its Configure
+# script pulls in Time::Piece, IPC::Cmd, FindBin and Pod::Html, none of which
+# ship with the minimal perl-interpreter.
 RUN dnf install -y --setopt=install_weak_deps=False \
         gcc \
         musl-gcc \
         openssl-devel \
+        perl-FindBin \
+        perl-IPC-Cmd \
+        perl-Pod-Html \
+        perl-Time-Piece \
+        perl-interpreter \
         pkg-config \
     && dnf clean all