Improve branch name error message
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### Problem to solve
As a developer, when my branch name does not match the specified regular expression, I would like the attempted branch name in the error message so I can quickly resolve my errors.
### Intended users
* [Delaney (Development Team Lead)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#delaney-development-team-lead)
* [Sasha (Software Developer)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#sasha-software-developer)
* [Devon (DevOps Engineer)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#devon-devops-engineer)
* [Sidney (Systems Administrator)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#sidney-systems-administrator)
* [Rachel (Release Manager)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#rachel-release-manager)
* [Simone (Software Engineer in Test)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#simone-software-engineer-in-test)
### User experience goal
The user should be able to quickly resolve branch name errors.
### Proposal
When a branch name does not conform to the specified regular expression, include the attempted branch name in the error message.
Example error message for a cherry-picked branch name:
> Branch name (`feat/X~ te$t !*`) does not follow the pattern '^((feature|personal)(-[a-z0-9]+){2,}|development|(cherry\-pick\-[a-z0-9]+))$'
### Further details
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### Permissions and Security
### Documentation
### Availability & Testing
### What does success look like, and how can we measure that?
### What is the type of buyer?
### Is this a cross-stage feature?
### Links / references
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issue