chore(e2e): run tests against Firefox 86 on macOS Catalina

[Splaktar]

AngularJS is in LTS mode

We are no longer accepting changes that are not critical bug fixes into this project. See https://blog.angular.io/stable-angularjs-and-long-term-support-7e077635ee9c for more detail.

Does this PR fix a regression since 1.7.0, a security flaw, or a problem caused by a new browser version? Yes

What is the current behavior? (You can also link to an open issue here)

• e2e is only run against Firefox 76 which is 14 months old on a 2 yo OS (macOS Mojave)

What is the new behavior (if this is a feature change)?

• e2e is run against Firefox 86 on macOS Catalina

Does this PR introduce a breaking change? No

Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines
• [x] Fix/Feature: Docs have been added/updated
• [x] Fix/Feature: Tests have been added; existing tests pass

Other information:

This is expected to break due to https://github.com/angular/angular.js/issues/17117.

[Splaktar]

This verifies #17117 as there are many Failed: Error while running testForAngular: Timed out after 30000 ms in the e2e tests.

It doesn't look like we can test against and verify compatibility with Firefox 86-89.