[cpackget] Installed pack is not purgeable

[jkrech]

Describe the bug

  cpackget rm --purge ARM.CMSIS.6.0.0-dev53+g825ef36.pack

Fails to remove the pack version from .Download folder.

To Reproduce
Steps to reproduce the behavior:

1. cpackget add https://github.com/ARM-software/CMSIS_6/releases/download/dev%2Fv6.0.0-dev53/ARM.CMSIS.6.0.0-dev53+g825ef36.pack
2. cpackget rm --purge ARM::CMSIS@6.0.0-dev53+g825ef36
3. See error:

I: Using pack root: "C:\Users\jkrech\AppData\Local\Arm\Packs" (default mode - no specific CMSIS_PACK_ROOT chosen)
I: Removing [ARM::CMSIS@6.0.0-dev53+g825ef36]
E: pack not purgeable

In verbose mode you can see the file name pattern match:
D: Listing files and directories in "C:\Users\jkrech\AppData\Local\Arm\Packs.Download" that match "ARM.CMSIS.6.0.0-dev53+g825ef36.(?:pack|zip|pdsc)"

Probably the . - + characters confuse the regular expression search.
I don't know why the tool does search for an exact filename?

Expected behavior
The pack version file is located in the .Download folder and must be removed:

Environment (please complete the following information):

• OS: Windows
• Version 10

Additional context
N/A

[jkrech]

Semantic Versioning specifies that two versions that only differ after "+" (build meta information) are considered "identical".
This means the build meta information should be ignored.
When the user refers to a pack version with "+" is should only be considered if the user is specifying a file (filesystem or url).
It could make sense, to rename the pack version and strip the version after "+" in .Download. The pack version directory must not include "+1234".