chore: specify coffee fixtures / convert others

[jennifer-shehane]

User Changelog

N/A

Additional Details

• rename fixtures that are required to be coffee files for tests (so we don’t try to convert them in future)
• convert fixture that is not required to be coffee to js
• update comments in code to reference .js files (so I’ll stop searching for these references)

[cypress-bot]

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[cypress]

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Test summary

9104 • 0 • 118 • 3 • 2

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Run details

Project	cypress
Status	Passed
Commit	6baadd2
Started	Dec 3, 2020 3:59 PM
Ended	Dec 3, 2020 4:11 PM
Duration	12:11 💡
OS	Linux Debian - 10.5
Browser	Multiple

View run in Cypress Dashboard ➡️

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Flakiness

	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
	commands/net_stubbing_spec.ts		1
1	network stubbing > stubbing with static responses > still works after a cy.visit

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[kuceb]

removed eslint-disable comment