feat(types): have cy.wait(alias) yield new Request type

[flotwig]

• Closes cy.wait types for yielded object are incorrect when awaiting cy.route2 routes #8731

User facing changelog

• Updated the type yielded by cy.wait(alias) to the cy.http Request type. This is a breaking types change, previously, it yielded Cypress.WaitXHR. For more information, please see the migration guide.

Additional details

How has the user experience changed?

PR Tasks

• Have tests been added/updated?
• Has the original issue or this PR been tagged with a release in ZenHub?
• Has a PR for user-facing changes been opened in cypress-documentation? docs(migration-guide): document cy.wait(alias) type change cypress-documentation#3337
• Have API changes been updated in the type definitions?
• [na] Have new configuration options been added to the cypress.schema.json?

[cypress-bot]

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[cypress]

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Test summary

8740 • 0 • 118 • 3 • 1

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Run details

Project	cypress
Status	Passed
Commit	cbca7b3
Started	Nov 23, 2020 5:11 PM
Ended	Nov 23, 2020 5:23 PM
Duration	12:05 💡
OS	Linux Debian - 10.5
Browser	Multiple

View run in Cypress Dashboard ➡️

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Flakiness

	cypress/integration/retries.ui.spec.js		1
1	runner/cypress retries.ui.spec > opens attempt on each attempt failure for the screenshot, and closes after test passes

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