Don't run Perl tests when on riscv64

I tried to rely on TARGETARCH, but unfortunatly Docker doesn't
officially supports or recommends using it.

If we ever need alpine support: apk --print-arch

The testsuite takes to long on the single riscv64 for all trixie builds.

Context:
> Unfortunately, our singular riscv64 build server in Docker Official
> Images is unable to complete any of the perl image builds. We have a
> 3-hour time limit on all builds (to ensure things don't get stuck and
> prevent resource monopolization) and none of them are able to complete
> in that time. Is there anything that could be skipped or changed on
> riscv64 builds to help them complete faster?

https://doi-janky.infosiftr.net/job/meta/job/riscv64/job/build/13644/pipeline-overview/

Closes: #195

Signed-off-by: Wesley Schwengle <[email protected]>

Author: waterkip

generate.pl

@@ -330,7 +330,7 @@ =head1 DESCRIPTION
     && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
     && ./Configure -Darchname="$gnuArch" "$archFlag" {{args}} {{extra_flags}} -des \
     && make -j$(nproc) \
-    && {{test}} \
+    && { [ "$(dpkg --print-architecture)" = 'riscv64' ] || {{test}}; } \
     && make install \
     && cd /usr/src \
     && curl -fLO {{cpanm_dist_url}} \