osmo_interact: improve vty transcript language by a regular rexex
Currently the transcript language understand 3 different tokens: ... (ignore all lines until the following line matches) ... !REGEX (ignore all lines except REXEX)
But to support osmo-stp with different compile options, the vty help is indented with different amount of spaces depending on the compile options. To support those add a regular regex using the prefix !r!
E.g. OsmoSTP(config-cs7-as)# ? - description Save human-readable description of the object vs + description Save human-readable description of the object
