Fix missing mocha test hooks in a junit report

[vgrigoruk]

Proposed changes

After upgrading to wdio 6 (and mocha 8), we have noticed that junit report doesn't contain failed mocha hooks anymore.

It looks like mocha test hook titles are changed in mocha 8. Previously, it is used to be "before all" hook", "after all" hook, etc, but now it is "before all" hook for "test name".
This PR fixes the condition used to add failed hooks to a generated junit report. It also adds beforeEach/afterEach hooks to the junit report.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

Reviewers: @webdriverio/project-committers

[mgrybyk]

Can you please add a test for that?

[christian-bromann]

@vgrigoruk please let us know if we can help you with the unit tests 😉

[vgrigoruk]

We already have a test forbefore all and after all hooks (however, the fixture data have titles in a pre-mocha-8 format and that's why it didn't fail previously). I've kept this test as is to prove the change is backward-compatible.
I've also added tests for failed before each and after each hooks, which test against mocha 8 format of hook title field.

[christian-bromann]

👍 thank you!