The load command also unpacks to the standard directory

[isc-dchui]

Description

• Resolves IPM load - setting a custom target directory #945
• load will also unpack tarballs/copy non-tarball sources to the ${ipmdir} directory that install uses
• Also fixes a bunch of call sights that directly call into %File.Library.CreateDirectoryChain instead of the wrapper that properly handles the error codes, e.g. -13 = Permission denied

Testing

Added new test to Test.PM.Integration.FileBinaryTar
Tested the error handling wrapper and got this very readable error:

zpm:USER>install isc.json

ERROR! Error creating directory chain /usr/irissys/ipm/isc.json/2.0.1/: <13> Permission denied

Checklist

• This branch has the latest changes from the main branch rebased or merged.
• Changelog entry added.
• Unit (zpm test -only) and integration tests (zpm verify -only) pass.
• Style matches the style guide in the contributing guide.
• Documentation has been/will be updated
  • Source controlled docs, e.g. README.md, should be included in this PR and Wiki changes should be made after this PR is merged (add an extra issue for this if needed)
• Pull request correctly renders in the "Preview" tab.