doc: update libwebkit2gtk install method & remove unnecessary package

1.We updated libwebkit2gtk-4.0-dev install method for Canonical had
removed that package already, but Tauri need it, so we advice the user
to download the dependencies through Ubuntu22.04's repo or adopt our
links directly.

2.remove unnecessary package: libappindicator3-dev, we found it is possible
to build acrn without that dependency, so we remove it now.

Signed-off-by: dongpingx <dongpingx.wu@intel.com>
Tracked-On: #8659

doc/tutorials/acrn_configurator_tool.rst

@@ -444,16 +444,18 @@ how to build the Debian package from source code.
 
    .. code-block:: bash
 
-      sudo apt install -y libwebkit2gtk-4.0-dev \
-         build-essential \
+      sudo apt install -y build-essential \
          curl \
          wget \
          libssl-dev \
          libgtk-3-dev \
-         libappindicator3-dev \
          librsvg2-dev \
          python3-venv
 
+      cd /tmp/
+      wget http://security.ubuntu.com/ubuntu/pool/main/w/webkit2gtk/libwebkit2gtk-4.0-37_2.44.2-0ubuntu0.22.04.1_amd64.deb http://mirrors.kernel.org/ubuntu/pool/main/i/icu/libicu70_70.1-2_amd64.deb http://security.ubuntu.com/ubuntu/pool/main/w/webkit2gtk/libjavascriptcoregtk-4.0-18_2.44.2-0ubuntu0.22.04.1_amd64.deb
+      sudo apt install ./libwebkit2gtk-4.0-37_2.44.2-0ubuntu0.22.04.1_amd64.deb ./libicu70_70.1-2_amd64.deb ./libjavascriptcoregtk-4.0-18_2.44.2-0ubuntu0.22.04.1_amd64.deb
+
 #. Install Node.js (npm included) as follows:
 
    a. We recommend using nvm to manage your Node.js runtime. It allows you to