At the moment on repo's with many CIPD packages the number
of CLI calls to 'cipd describe' can make it very slow.
This mechanism will call cipd ensure-file-resolve with the entire
list in one call then reference items from the list before trying
individual cipd describe commands.
Bug:b/279097790
Change-Id: Ieb4bc77853357cfadb3ea6311fa0013aa7999ac6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4551125
Reviewed-by: Gavin Mak <gavinmak@google.com>
Reviewed-by: Rachael Newitt <renewitt@google.com>
Commit-Queue: Dan Le Febvre <dlf@google.com>
