arrow: Enable Snappy compression (#12380)

In PR #12320, we enabled more compression algorithms for Arrow C++, but
had to disable Snappy because of build issues.

Since then, the Arrow project merged a PR
(apache/arrow#43706) which enables RTTI when
building Snappy.

Therefore, we can now enable Snappy in the OSS-Fuzz builds of Arrow C++
as well.

projects/arrow/build.sh

@@ -35,7 +35,6 @@ cd ${WORK}
 # would report leaks and error out.
 export ASAN_OPTIONS="detect_leaks=0"
 
-# Snappy disabled as it forces `-fno-rtti`, which is incompatible with UBSAN.
 cmake ${ARROW} -GNinja \
  -DCMAKE_BUILD_TYPE=Release \
  -DARROW_DEPENDENCY_SOURCE=BUNDLED \
@@ -61,7 +60,7 @@ cmake ${ARROW} -GNinja \
  -DARROW_WITH_BROTLI=on \
  -DARROW_WITH_BZ2=off \
  -DARROW_WITH_LZ4=on \
- -DARROW_WITH_SNAPPY=off \
+ -DARROW_WITH_SNAPPY=on \
  -DARROW_WITH_ZLIB=on \
  -DARROW_WITH_ZSTD=on \
  -DARROW_USE_GLOG=off \