Re-introduce packages.txt file
Re-introduce the packages.txt
file that contains a list of all built
packages within the project. This was removed as part of !475 (merged) but
turns out to be quite useful for several use-cases.
Code is mostly copied from the previous solution but I added it directly into the main package loop instead of having a separate loop.
Example:
# Package(s) built in WorkDir - 22.0.5
Control/AthenaCommon
Control/AthenaExamples/AthExHelloWorld