Part of a larger migration to remove Bootstrap Vue from GitLab UI

BREAKING CHANGE: support for following props have been dropped:
- pressed
- router-component-name
- exact
- exact-path
- exact-path-active-class (replaced with exact-active-class)
- no-prefetch (use prefetch instead)

feat(GlButton): remove BButton from GlButton

Closes #3163

See merge request !5122



Merged-by: Thomas Hutterer <thutterer@gitlab.com>
Approved-by: Lorenz van Herwaarden <lvanherwaarden@gitlab.com>
Approved-by: Thomas Hutterer <thutterer@gitlab.com>
Reviewed-by: Mark Florian <mflorian@gitlab.com>
Reviewed-by: Thomas Hutterer <thutterer@gitlab.com>
Reviewed-by: Lorenz van Herwaarden <lvanherwaarden@gitlab.com>
Co-authored-by: Peter Hegman <phegman@gitlab.com>

# [114.0.0](gitlab-org/gitlab-ui@v113.7.0...v114.0.0) (2025-05-15)

### Features

* **GlButton:** remove BButton from GlButton ([fcdca4ee](gitlab-org/gitlab-ui@fcdca4ee))

### BREAKING CHANGES

* **GlButton:** support for following props have been dropped:
- pressed
- router-component-name
- exact
- exact-path
- exact-path-active-class (replaced with exact-active-class)
- no-prefetch (use prefetch instead)