FE: Use @coreui/bootstrap-vue components for the login button
FE: Use @coreui/bootstrap-vue components for the login button

Previous changes made the login button not work anymore, this commit
migrates the login button to use the coreui/bootstrap-vue components

Signed-off-by: Ryan Lerch <e809e25f3c554b2b195ccd768cd9a485288f896f@redhat.com>

fedora-infra/fmn,fedora-infra/fmn,fedora-infra/fmn,fedora-infra/fmn,fedora-infra/fmn