add automatic detection of computing platforms

[qaz-t]

The new code will automatically obtain all computing platforms and stable computing platforms, and the intersection of the them are the current active computing platforms. This should reduce the workload on future computing platform updates.

[paul-botsco-2-0]

Thanks for the contribution. Before we can merge this, we need @qaz-t to sign the Contributor License Agreement

[hboutemy]

just discovered the mapfile bash builtin command https://medium.com/@linuxadminhacks/understanding-mapfile-command-in-linux-9a13a2e2008a
nice https://ss64.com/bash/mapfile.html / https://www.gnu.org/software/bash/manual/bash.html#Bash-Builtins , introduced in bash 4.0 as readarray https://stackoverflow.com/questions/11393817/read-lines-from-a-file-into-a-bash-array
I'll have a look at conflict resolution