Add helper method for stripping whitespace off env variables
user
```ruby
module Gitlab
  class Util
    class << self
      def get_env(key)
        ENV[key]&.strip
      end

      def set_env(key, value)
        ENV[key] = value&.strip
      end

      def set_env_if_missing(key, value)
        ENV[key] ||= value&.strip
      end
    end
  end
end
```
assistant