Add fee ID/key to parent cart and checkout block

[larsenlarsson]

What

Add the ID of a fee to the parent DIV in cart and checkout block.
So
<div class="wc-block-components-totals-item wc-block-components-totals-fees">
becomes
<div class="wc-block-components-totals-item wc-block-components-totals-fees wc-block-components-totals-fees__fee-1">

see discussion:
https://github.com/woocommerce/woocommerce-blocks/discussions/11041#discussioncomment-7103099
closes #11053

Why

To add styles to a specific fee or other data with css (content-attribute).

Testing Instructions

• add a fee to you cart, for example by using this code in your functions.php

add_action( 'woocommerce_cart_calculate_fees', function( $cart ) {
	$cart->add_fee( 'Fee 0', 5, true );
	$cart->add_fee( 'Fee 2', 10, true );
	$cart->add_fee( 'Fee 3', 50, true );
});

• go to your cart or checkout block
• check the CSS classes of the fee elements with your browser developer tool

• Do not include in the Testing Notes
• Should be tested by the development team exclusively

Screenshots or screencast

WooCommerce Visibility

Required:

• WooCommerce Core
• Feature plugin
• Experimental
• N/A

Checklist

Required:

• This PR has either a [type] label or a [skip-changelog] label.
• This PR is assigned to a milestone.

Conditional:

• This PR has a changelog description (if [skip-changelog] label is not present).
• This PR adds/removes a feature flag & I've updated this doc.
• This PR adds/removes an experimental interfaces, and I've updated this doc.
• This PR has been accessibility tested.
• This PR has had any necessary documentation added/updated.

Changelog

Add fee ID to parent cart and checkout block.

[nielslange]

Thank you so much for your contribution, @larsenlarsson! The change works as expected and all CI tests are passing. I'll be merging this PR now. Thanks for improving WooCommerce Blocks! 🙌