[Backport] Checkout - Fix JS error Cannot read property 'quoteData' of undefined

[amol2jcommerce]

Original Pull Request

#18503

Description

Sometimes after going to checkout page we have infinite loading indicator that caused by JS error
Cannot read property 'quoteData' of undefined.

This issue happened because quote.js file using window.checkoutConfig, that inserted directly into page, but sometimes quote.js component initialization executes first.

magento2/app/code/Magento/Checkout/view/frontend/web/js/model/quote.js

Lines 32 to 36 in f6ca94c

	quoteData = window.checkoutConfig.quoteData,
	basePriceFormat = window.checkoutConfig.basePriceFormat,
	priceFormat = window.checkoutConfig.priceFormat,
	storeCode = window.checkoutConfig.storeCode,
	totalsData = proceedTotalsData(window.checkoutConfig.totalsData),

This change adding waiting when dome ready and window.checkoutConfig is already available

Fixed Issues (if relevant)

N/A

Related issues

1. Magento 2.2.3 TypeErrors Cannot read property 'quoteData' / 'storecode' / 'sectionLoadUrl' of undefined  #14412: Magento 2.2.3 TypeErrors Cannot read property 'quoteData' / 'storecode' / 'sectionLoadUrl' of undefined

Manual testing scenarios

1. Add some product to the cart
2. Go to checkout page
3. See console errors

Note: This issue reproducing quote small amount of times

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @amol2jcommerce. Thank you for your contribution
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[magento-engcom-team]

Hi @rogyar, thank you for the review.
ENGCOM-4369 has been created to process this Pull Request

[soleksii]

✔️ QA Passed

[ghost]

Hi @amol2jcommerce, thank you for your contribution!
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[LusienGG]

the same bug reproduced on 2.3.1