Can no longer override all button classes on Paginator

[knd775]

Current Behavior

When setting the buttonClasses prop on the Paginator component, btn-icon is not overridden, leading to styling issues with text more than a couple characters long.

Before 0.124.2:

After:

Steps To Reproduce

1. Use paginator with buttonClasses and text labels for the buttons

<Paginator
  bind:settings={$tableStore.pagination}
  buttonClasses="btn variant-filled"
  buttonTextPrevious="Previous"
  buttonTextNext="Next"
  {disabled} /

Anything else?

No response

[endigo9740]

FYI the fix is to move all instances of btn-icon from the inline HTML button classes, back up to the buttonClasses prop. I'd welcome a PR if someone can jump on this sooner than myself!