fix(query) misleading message when label filter is too long.

[yu-shipit]

Pull Request checklist

• [x] The commit(s) message(s) follows the contribution guidelines ?
• [x] Tests for the changes have been added (for bug fixes / features) ?
• [ ] Docs have been added / updated (for bug fixes / features) ?

Current behavior :

Error code does not indicate that the regex is too long. valid_query: Cannot parse […]

New behavior : Error code will indicate that the regex is too long. The error will contain meaningful message Regular expression filters should be <=

BREAKING CHANGES

If this PR contains a breaking change, please describe the impact and migration path for existing applications. If not please remove this section.

Breaking changes may include:

• Any schema changes to any Cassandra tables
• The serialized format for Dataset and Column (see .toString methods)
• Over the wire formats for Akka messages / case classes
• Changes to the HTTP public API
• Changes to query parsing / PromQL parsing

Other information: