Update psyclone to support next release syntax

[hiker]

Support the new/future PSyclone command line options.

[hiker]

Hi Luke, with Jason being out for some time, I need you to review this PR. I have verified that it works as expected with Jason's lfric_atm-fab work.

Background: the next PSyclone release will change command line options:
-api dynamo0.3 --> --psykal-dsl lfric
-api gocean1.0--> --psykal-dsl gocean
-api nemo --> new default, so no option required. BUT the output filename must then be specified using -o instead of -opsy

To make this change even more annoying: the psyclone version number does not change on trunk (and ng-arch needs trunk). While we are working on a new release (and discussing a way to add a specific version number for trunk), for now there is no easy way to identify if psyclone version 2.5.0 is the release, or current trunk.

So this patch adds:

• determining the PSyclone version number. If the version is 2.5.0, it tries to run the old style -api nemo option. If this is an error, we know it is current trunk, and we set the version number to 2.5.0.1
• Old style and new style options will be mapped (depending on version number). E.g. if nemo is specified, and we are on current trunk, we will not add any -api (i.e. remove the nemo).