Revert "Merge branch 'regex-button-update-klmn' into 'master'"

What does this MR do?

This MR reverts !44996 (merged) which caused a visual regression in the sign in button.

Screenshots

Before (on master and .com)	After (this MR)

Does this MR meet the acceptance criteria?

Conformity

• [ ] Changelog entry Not needed since this should be fixed in the same release.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

References

• Fixes #270118 (closed)