[CI] Disable chronik plugins in the release

Summary: The last release added support for chronik plugin but it doesn't work 100% as expected. Let's disable it until the investigation is completed. Also the build appears to be non-deterministic (at least not always).

Test Plan: Run the Linux guix build.

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D17086

contrib/guix/libexec/build.sh

@@ -312,7 +312,7 @@ case "$HOST" in
         CMAKE_EXTRA_OPTIONS=(-DBUILD_BITCOIN_SEEDER=OFF -DBUILD_BITCOIN_CHRONIK=ON -DCPACK_STRIP_FILES=ON -DCPACK_PACKAGE_FILE_NAME="${DISTNAME}-win64-setup-unsigned")
         ;;
     *linux*)
-        CMAKE_EXTRA_OPTIONS=(-DENABLE_STATIC_LIBSTDCXX=ON -DENABLE_GLIBC_BACK_COMPAT=ON -DBUILD_BITCOIN_CHRONIK=ON -DBUILD_BITCOIN_CHRONIK_PLUGINS=ON -DUSE_LINKER=)
+        CMAKE_EXTRA_OPTIONS=(-DENABLE_STATIC_LIBSTDCXX=ON -DENABLE_GLIBC_BACK_COMPAT=ON -DBUILD_BITCOIN_CHRONIK=ON -DBUILD_BITCOIN_CHRONIK_PLUGINS=OFF -DUSE_LINKER=)
         ;;
     *darwin*)
         # GUIX doesn't properly set /bin/cc and /bin/c++ so cmake will pick the