feat: added old dot syntax to progress-stepper

[agliga]

Fixes #1862

• This PR contains CSS changes
• This PR does not contain CSS changes

NOTE
This PR also includes a fix to storybook. There is an issue where there was an argument passed to a mixin in listbox/combobox which was breaking on storybook start

Description

• As some teams saw the new progress stepper changes, they needed a larger change to support the new syntax. This PR adds the old syntax as an option. We can pass progress-stepper__items--current to show the old syntax. This would also be updated in ebayui to add a new defaultState as current which would show the current item as a bubble and remove the line.
• Added the old current icon
• I only added storybook examples. I did not show this on docs because we don't want to support this more than a couple of versions

Notes

• There was some issue with descending specificity which would require a complete restructure of the less file. Since this is temporary, I disabled it for one rule.

Screenshots

Checklist

• I verify the build is in a non-broken state
• I verify all changes are within scope of the linked issue
• I regenerated all CSS files under dist folder
• I tested the UI in all supported browsers
• I tested the UI in dark mode and RTL mode
• I added/updated/removed Storybook coverage as appropriate

[ArtBlue]

The changes look good, but not sure why we'd want to support old syntax since this is a major version release and major code changes/upgrades are to be expected.

[agliga]

The changes look good, but not sure why we'd want to support old syntax since this is a major version release and major code changes/upgrades are to be expected.

There was a large thread about this. Well sync up Monday