Chromium browser has been added to Ubuntu 20 (#2463)

* deploy script for chromium-browser has been created

* Chromium-browser.sh has been added to packer template

* Chromium has been added to software report

* Chromium-browser installation has been moved to toolset

* Bug - chromium-browser.sh has been removed from ubuntu2004.json

* Browsers documentation has been fixed

images/linux/toolsets/toolset-2004.json

@@ -106,6 +106,7 @@
     "apt": {
         "common_packages": [
             "build-essential",
+            "chromium-browser",
             "dbus",
             "dnsutils",
             "dpkg",