[Ubuntu] Migrate Browsers and Rust tests to Pester (#2323)

* add tests for browsers and rust

* small fix

* fix tests invoking

* small fixes

* resolve conflicts

* fix firefox test

images/linux/scripts/tests/Browsers.Tests.ps1

@@ -0,0 +1,19 @@
+Describe "Firefox" {
+    It "Firefox" {
+        "sudo -i firefox --version" | Should -ReturnZeroExitCode
+    }
+
+    It "Geckodriver" {
+        "geckodriver --version" | Should -ReturnZeroExitCode
+    }
+}
+
+Describe "Chrome" {
+    It "Chrome" {
+        "google-chrome --version" | Should -ReturnZeroExitCode
+    }
+
+    It "Chrome Driver" {
+        "chromedriver --version" | Should -ReturnZeroExitCode
+    }
+}