MTE-2907 Report test result to Github and to Slack

[clarmso]

:scroll: Tickets

Jira ticket

:bulb: Description

This PR builds upon the first attempt to run Focus smoke tests on Github Actions

• Report test results (failures only) to Github Actions job's page
• Report test results (failures only) to Slack notifications
• Use xcpretty to make the test run more readable.
• PIpe the verbose test run output to xcodebuild.log and upload to the Github Actions job

Sample test run: https://github.com/clarmso/firefox-ios/actions/runs/9708545464 Slack notifications:

• Success: https://mozilla.slack.com/archives/C016BC5FUHJ/p1719555426170139
• Contains failures: (Todo - waiting for workflow to finish)

:pencil: Checklist

You have to check all boxes before merging

• [X] Filled in the above information (tickets numbers and description of your work)
• [ ] Updated the PR name to follow our PR naming guidelines
• [ ] Wrote unit tests and/or ensured the tests suite is passing
• [ ] When working on UI, I checked and implemented accessibility (minimum Dynamic Text and VoiceOver)
• [ ] If needed, I updated documentation / comments for complex code and public methods
• [ ] If needed, added a backport comment (example @Mergifyio backport release/v120)

[mobiletest-ci-bot]

	Messages
:book:	Edited 1 files
:book:	Created 1 files

Generated by :no_entry_sign: Danger Swift against 981c64fc6248bbf3cced03594e5fbe68c616e844

[isabelrios]

Could you please @AaronMT help us review this PR as the end goal is to have something similar to the notifications that you created for android? Thanks! 🙏