script: fix CI jobs running slow problem.

apollo.sh

@@ -197,7 +197,7 @@ function cibuild_extended() {
   cd /apollo
   info "Building modules ..."
 
-  JOB_ARG="--jobs=$(nproc)"
+  JOB_ARG="--jobs=12"
   if [ "$MACHINE_ARCH" == 'aarch64' ]; then
     JOB_ARG="--jobs=3"
   fi
@@ -236,7 +236,7 @@ function cibuild() {
 
   info "Building modules ..."
 
-  JOB_ARG="--jobs=$(nproc)"
+  JOB_ARG="--jobs=12"
   if [ "$MACHINE_ARCH" == 'aarch64' ]; then
     JOB_ARG="--jobs=3"
   fi
@@ -499,7 +499,7 @@ function citest_basic() {
 #  "
   BUILD_TARGETS=`bazel query //modules/... union //cyber/... except //modules/tools/visualizer/... except //modules/data/tools/rosbag_to_record/...  except //modules/v2x/... except //modules/drivers/video/tools/decode_video/... except //modules/map/tools/map_datachecker/... `
 
-  JOB_ARG="--jobs=$(nproc) --ram_utilization_factor 80"
+  JOB_ARG="--jobs=12 --ram_utilization_factor 80"
 
   BUILD_TARGETS="`echo "$BUILD_TARGETS" | grep "modules\/" | grep "test" \
           | grep -v "modules\/planning" \
@@ -537,7 +537,7 @@ function citest_extended() {
     `bazel query //modules/prediction/... union //modules/control/...`
   "
 
-  JOB_ARG="--jobs=$(nproc) --ram_utilization_factor 80"
+  JOB_ARG="--jobs=12 --ram_utilization_factor 80"
 
   BUILD_TARGETS="`echo "$BUILD_TARGETS" | grep "test"`"