infra: Suppress unsigned integer overflow crashes

Keep `unsigned-integer-overflow` instrumentation to use it
as a coverage signal, but silence the error reports with this
ubsan option. Taken from OSS-Fuzz.

Author: marcofleon

infra/Dockerfile.base

@@ -163,7 +163,7 @@ ENV MSAN_SYMBOLIZER_PATH="/usr/bin/llvm-symbolizer"
 
 RUN touch ubsan_suppressions
 ENV ASAN_OPTIONS="strict_string_checks=1:detect_invalid_pointer_pairs=2:detect_stack_use_after_return=1:check_initialization_order=1:strict_init_order=1:abort_on_error=1:exitcode=75"
-ENV UBSAN_OPTIONS="suppressions=/workdir/ubsan_suppressions:print_stacktrace=1:halt_on_error=1:abort_on_error=1:report_error_type=1:exitcode=76"
+ENV UBSAN_OPTIONS="suppressions=/workdir/ubsan_suppressions:print_stacktrace=1:halt_on_error=1:abort_on_error=1:report_error_type=1:silence_unsigned_overflow=1:exitcode=76"
 
 # Enable env_logger by default with level info
 ENV RUST_LOG=trace