ci: update browsers tests to test supported browsers only

https://next.angular.io/guide/browser-support
(cherry picked from commit c7ebab7)

Author: alan-agius4

tests/legacy-cli/e2e/assets/protractor-saucelabs.conf.js

@@ -19,33 +19,17 @@ exports.config = {
   multiCapabilities: [
     {
       browserName: 'chrome',
-      version: '41',
+      version: '80',
       tunnelIdentifier,
     },
     {
-      browserName: 'chrome',
-      version: '75',
-      tunnelIdentifier,
-    },
-    {
-      browserName: 'safari',
-      platform: 'OS X 10.11',
-      version: '9.0',
-      tunnelIdentifier,
-    },
-    {
-      browserName: 'safari',
-      platform: 'OS X 10.12',
-      version: '10.1',
-      // This specific version is needed as otherwise it will not pass
-      // See: https://github.com/angular/angular-cli/issues/15084
-      seleniumVersion: '3.4.0',
+      browserName: 'firefox',
+      version: '72',
       tunnelIdentifier,
     },
     {
-      browserName: 'safari',
-      platform: 'macOS 10.13',
-      version: '11.1',
+      browserName: 'firefox',
+      version: '68', // Latest Firefox ESR version
       tunnelIdentifier,
     },
     {
@@ -55,18 +39,9 @@ exports.config = {
       tunnelIdentifier,
     },
     {
-      browserName: 'firefox',
-      version: '48',
-      tunnelIdentifier,
-    },
-    {
-      browserName: 'firefox',
-      version: '60',
-      tunnelIdentifier,
-    },
-    {
-      browserName: 'firefox',
-      version: '68',
+      browserName: 'safari',
+      platform: 'macOS 10.15',
+      version: '13.0',
       tunnelIdentifier,
     },
     {
@@ -81,12 +56,6 @@ exports.config = {
       version: '11',
       tunnelIdentifier,
     },
-    {
-      browserName: "MicrosoftEdge",
-      platform: 'Windows 10',
-      version: "14.14393",
-      tunnelIdentifier,
-    },
     {
       browserName: "MicrosoftEdge",
       platform: 'Windows 10',