Refactor config addition in action.yml

Replaced the loop for adding configs with a heredoc for better readability.

.github/actions/chroot/action.yml

@@ -8,36 +8,23 @@ runs:
   - name: add configs for ubuntu-chroot
     shell: bash
     run: |
-     configs=(
-     "CONFIG_NAMESPACES=y"
-     "CONFIG_PID_NS=y"
-     "CONFIG_UTS_NS=y"
-     "CONFIG_MNT_NS=y"
-     "CONFIG_IPC_NS=y"
-     "CONFIG_DEVTMPFS=y"
-     "CONFIG_PROC_FS=y"
-     "CONFIG_SYSFS=y"
-     "CONFIG_BINFMT_MISC=y"
-     "CONFIG_BINFMT_SCRIPT=y"
-     "CONFIG_BINFMT_ELF=y"
-     "CONFIG_SYSVIPC=y"
-     "CONFIG_SYSVIPC_SYSCTL=y"
-     "CONFIG_PROC_SYSCTL=y"
-     "CONFIG_POSIX_MQUEUE=y"
-     "CONFIG_CGROUPS=y"
-     "CONFIG_CGROUP_DEVICE=y"
-     "CONFIG_MEMCG=y"
-     )
-
-     for config in "${configs[@]}"; do
-         key="${config%%=*}"
-
-         if grep -qE "^(${key}=|# ${key} is not set$)" "$GKI_DEFCONFIG"; then
-             sed -i -E \
-                 -e "s/^${key}=.*/${config}/" \
-                 -e "s/^# ${key} is not set\$/${config}/" \
-                 "$GKI_DEFCONFIG"
-         else
-             echo "$config" >> "$GKI_DEFCONFIG"
-         fi
-     done
+     cat >> "$GKI_DEFCONFIG" << EOF
+     CONFIG_NAMESPACES=y
+     CONFIG_PID_NS=y
+     CONFIG_UTS_NS=y
+     CONFIG_MNT_NS=y
+     CONFIG_IPC_NS=y
+     CONFIG_DEVTMPFS=y
+     CONFIG_PROC_FS=y
+     CONFIG_SYSFS=y
+     CONFIG_BINFMT_MISC=y
+     CONFIG_BINFMT_SCRIPT=y
+     CONFIG_BINFMT_ELF=y
+     CONFIG_SYSVIPC=y
+     CONFIG_SYSVIPC_SYSCTL=y
+     CONFIG_PROC_SYSCTL=y
+     CONFIG_POSIX_MQUEUE=y
+     CONFIG_CGROUPS=y
+     CONFIG_CGROUP_DEVICE=y
+     CONFIG_MEMCG=y
+     EOF