Update scenario urls for delayjs

[jeawhanlee]

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Describe the bug
In this PR we forgot to add the urls for delayjs script and so when we run npm run test:delayjs:genesis or any delayjs related test, we will not get the scenario urls because it was removed.

To Reproduce
Steps to reproduce the behavior:

1. Run any of the related delayjs tests:

   wp-rocket-e2e/package.json

   Lines 20 to 23 in 7b589ba

   	"test:delayjs:genesis": "THEME=genesis-sample-develop $npm_package_config_testCommand --tags @delayjs",
   	"test:delayjs:flatsome": "THEME=flatsome $npm_package_config_testCommand --tags @delayjs",
   	"test:delayjs:divi": "THEME=Divi $npm_package_config_testCommand --tags @delayjs",
   	"test:delayjs:astra": "THEME=astra $npm_package_config_testCommand --tags @delayjs",

2. See that backstop references are not created for it.

Expected behavior
We need to create backstop references when we run the following tests:

• test:delayjs:genesis
• test:delayjs:flatsome
• test:delayjs:divi
• test:delayjs:astra

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
We need to add scenario urls for delayjs here: https://github.com/wp-media/wp-rocket-e2e/blob/develop/config/scenarioUrls.json
We have it like so previously:

delayJs: {
    path: ''
},
delayJsMobile: {
    path: '',
    mobile: true,
},

Acceptance Criteria (for WP Media team use only)
Clear instructions for developers, to be added before the grooming