Introduces client-specific request and response classes that do not
depend on the server
The `type` parameter is named `licenseType` in the response class to be
more descriptive. The parts that make up the acknowledged-required
response are given slightly different names than their server-response
types to be consistent with the naming in the put license API
Tests do not cover all cases because the integ test cluster starts up
with a trial license - this will be addressed in a future commit
Rest HL client: Add get license action
Continues to use String instead of a more complex License class to
hold the license text similarly to put license.
Relates #29827
In the HL REST client we replace the License object with a string, because of
complexity of this class. It is also not really needed on the client side since
end-users are not interacting with the license besides passing it as a string
to the server.
Relates #29827
Andy Bristol
Vladimir Dolzhenko
lipsill
Yannick Welsch
Igor Motov
debadair