Revert "CI: oss-fuzz: do build all the tests/benchmarks"

AFLplusplus does not support `-help=1`.

This reverts commit dddfabf.

.ci/oss-fuzz.sh

@@ -32,14 +32,13 @@ ln -f -s /usr/bin/gold /usr/bin/ld
 cmake \
   -G"Unix Makefiles" -DBINARY_PACKAGE_BUILD=ON -DWITH_OPENMP=OFF \
   -DWITH_PUGIXML=OFF -DUSE_XMLLINT=OFF -DWITH_JPEG=OFF -DWITH_ZLIB=OFF \
-  -DBUILD_TESTING=ON -DALLOW_DOWNLOADING_GOOGLETEST=ON \
-  -DBUILD_BENCHMARKING=ON -DALLOW_DOWNLOADING_GOOGLEBENCHMARK=ON \
-  -DBUILD_TOOLS=ON -DCMAKE_BUILD_TYPE=FUZZ -DBUILD_FUZZERS=ON \
+  -DBUILD_TESTING=OFF -DBUILD_TOOLS=OFF -DBUILD_BENCHMARKING=OFF \
+  -DCMAKE_BUILD_TYPE=FUZZ -DBUILD_FUZZERS=ON \
   -DLIB_FUZZING_ENGINE:STRING="$LIB_FUZZING_ENGINE" \
   -DCMAKE_INSTALL_PREFIX:PATH="$OUT" -DCMAKE_INSTALL_BINDIR:PATH="$OUT" \
   "$SRC/librawspeed/"
 
-make -j$(nproc) all && ctest -j$(nproc) && make -j$(nproc) install
+make -j$(nproc) all && make -j$(nproc) install
 
 cd "$SRC"
 rm -rf "$WORK/build"