[Look & Feel] Refactor breadcrumb styling to use OUI-defined styling

[joshuarrrr]

Remove styling hacks and use the vanilla breadcrumb components.

[joshuarrrr]

Initial fix: https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4341

Based on feedback, we may still need further changes to the OUI components before this is ready to merge to main.

[joshuarrrr]

Via https://github.com/opensearch-project/oui/issues/807#issuecomment-1593491264

• [ ] Breadcrumb isn't using ouiColorPimary - looking at https://oui.opensearch.org/1.2/#/navigation/breadcrumbs it should be using a tint/shade based on ouiColorPrimary unless I am missing a specific definition of breadcrumb colors.
• [ ] The font looks a bit blurry in breadcrumb - this issue has also occurred in the past - however the ouiColorGhost may be contributing to this. With some guidance I can recommend some tweaks. Breadcrumb using Source Sans 3: Breadcrumb using Inter:
  • [ ] https://github.com/opensearch-project/oui/issues/807#issuecomment-1593760552
• [ ] On a side note: a crumb with :focus shows am odd colored background that is not shaped as the crumb.