Add lib to recipe cipd package

This also removes entries that no longer exist in depot_tools.

R=jojwang@google.com

Change-Id: Ic2ddbf4f926d62baf8a0981ab21dad3a517b5a3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4301253
Reviewed-by: Joanna Wang <jojwang@chromium.org>
Commit-Queue: Joanna Wang <jojwang@chromium.org>
Auto-Submit: Josip Sokcevic <sokcevic@chromium.org>

.gitattributes

@@ -16,7 +16,6 @@
 # Extensionless tools we want and support scripts.
 /autoninja*                   recipes
 /clang*                       recipes
-/depot-tools-auth             recipes
 /download_from_google_storage recipes
 /fetch                        recipes
 /gclient                      recipes
@@ -36,7 +35,7 @@
 /cbuildbot      recipes
 /cros*          recipes
 
-/support/* recipes
+/lib/* recipes
 
 # TODO: There are some really junky dependencies in here that we should probably
 # move to vpython/cipd.