Create protected branches and protected tags that match with regex

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• Close this issue

• Add a column to protected_branches and protected_tags to indicate that it will use regex to match against ref names
• Change protected ref logic to consider name as a regex based on the new column
• Update controller and rest endpoints to accept a parameter for to create

Ensure that RE2 operators can be escaped. e.g. For example a branch like 1.{2}2 could be a problem (see git-check-ref-format)