CI: Check for licenses and exceptions being in the proper directory

[goneall]

Enhance the continuous integration script to make sure that any submitted license is in the src/licenses and any submitted exceptions are in the src/exceptions directory.

This can be done in the Makefile or the Github Actions script. the XML should contain <license... for the licenses and <exception for the exceptions.

This was originally reported in issue #1520

[Namdar21]

Enhance the continuous integration script to make sure that any submitted license is in the src/licenses and any submitted exceptions are in the src/exceptions directory.

This can be done in the Makefile or the Github Actions script. the XML should contain <license... for the licenses and <exception for the exceptions.

This was originally reported in issue #1520

[goneall]

@jlovejoy @swinslow I took a quick attempt to fix this in the Makefile and decided I just don't have the Makefile knowledge to do this easily. It would be great to look for a volunteer who's comfortable in Make.

Let's just roll this forward to the next release.