[Plugins] Add Sauce Labs reporter plugin

[FriggaHel]

Hello !

The purpose of this PR is to reference Sauce Labs plugin that permits to upload results to user's Sauce Lab account seamlessly.

Repo: https://github.com/saucelabs/sauce-cypress-plugin
Npm Package: https://www.npmjs.com/package/@saucelabs/cypress-plugin

---

Before submitting your plugin, please check to see if it fulfills these requirements:

• 🚀 Works with the latest major version of Cypress
• 🛠 Plugin purpose is clearly documented (in a README or docs website)
• 📝 Well-written documentation - A great example (link)
• 🔬 Tested using Cypress - tests using Cypress can act as both example usage and test coverage
• 👷‍♀️ CI pipeline that's passing (CircleCI and Github Actions are both free for Open Source)

If you have reason to believe your plugin does not need to meet certain requirements, please feel free to provide justification below:

[netlify]

👷 Deploy request for cypress-docs pending review.
Visit the deploys page to approve it

🔨 Explore the source changes: 37be779

[CLAassistant]

All committers have signed the CLA.

[KunalJain]

@amirrustam Would really appreciate your help here. Please let us know if you need more info from our side. Thank you so much for helping out!

[FriggaHel]

👋 @kevinold / @jennifer-shehane
I'm allowing myself to ping you as this PR has been here since a while and mainly un-noticed.
Let me know if I'm missing anything to make it approved !

[vercel]

@FriggaHel is attempting to deploy a commit to the Cypress Team on Vercel.

A member of the Team first needs to authorize it.