[iconButton] mdc-icon-button is not emitting theming styles(not using theme-styles() mixin)

[sandeeppatidar30]

Bug report

IconButton does not emitting theming styles while using core-styles() mixin.

usecase -

@use "@material/icon-button";
@include icon-button.core-styles;

Above code snippet is not using theme-styles mixin defined inside @material/icon-button/_icon-button-theme.

Steps to reproduce

1. Go to 'https://codepen.io/sp30457/pen/PodbJXR'
2. Check the styles as it is not using theming styles like hover-state-layer-color, hover-state-layer-opacity etc. for icon button. No css variables for these properties are available.

Actual behavior

It is not using theme-styles mixin inside core-styles() mixin.

Expected behavior

Ideally it should use theme-styles inside core-styles() mixin.

Your Environment:

Software	Version(s)
MDC Web	15.0.0-canary.7971d6ad5.0 for @material/icon-button
Browser	Chrome latest
Operating System	Windows