chore(fuzzing): Enable bes config for sandbox based fuzzers (dfinity#3623)

We recently saw a few spurious failures in the fuzzing hourly job and
have been unable to reproduce them locally. This PR enables remote
upload of artifacts for sandbox based fuzzers to debug the build
artifacts further.

Author: venkkatesh-sekar

bin/run-all-fuzzers.sh

@@ -24,7 +24,7 @@ EOF
         done
         LIST_OF_FUZZERS=$(bazel query 'attr(tags, "sandbox_libfuzzer", //rs/...)')
         for FUZZER in $LIST_OF_FUZZERS; do
-            bazel run --config=sandbox_fuzzing $FUZZER -- -runs=$MAX_EXECUTIONS
+            bazel run --config=bes --config=sandbox_fuzzing $FUZZER -- -runs=$MAX_EXECUTIONS
         done
         ;;