SG-44731 Adopt Git LFS for tk-core vendored dependency ZIPs and Qt resources

.gitattributes

@@ -7,16 +7,17 @@
 # By accessing, using, copying or modifying this work you indicate your
 # agreement to the Shotgun Pipeline Toolkit Source Code License. All rights
 # not expressly granted therein are reserved by Shotgun Software Inc.
-
 # Handle line endings automatically for files detected as text
 # and leave all files detected as binary untouched.
 * text=auto
-
 # Force the following filetypes to have unix eols, so Windows does not break them
 *.pickle binary
 # The git executable expects packed-refs to always have LF line endings, even on
 # Windows.
 **/packed-refs text eol=lf
-
 # We don't want CRLF conversion or any automatic change in there
 tests/python/third_party/** binary
+# LFS
+requirements/**/*.zip filter=lfs diff=lfs merge=lfs -text
+python/tank/**/resources_rc.py filter=lfs diff=lfs merge=lfs -text
+*.ttf filter=lfs diff=lfs merge=lfs -text

azure-pipelines.yml

@@ -14,7 +14,7 @@ resources:
     - repository: templates
       type: github
       name: shotgunsoftware/tk-ci-tools
-      ref: refs/heads/master
+      ref: refs/heads/ticket/SG-44731-use-git-lfs # TEMP until tk-ci-tools is merged
       endpoint: shotgunsoftware
 
 # We want builds to trigger for 3 reasons:

docs/descriptor.rst

@@ -319,6 +319,12 @@ descriptor is defined as the most recent commit for a given branch.
           app download. The git executable is, however, not needed during descriptor
           resolve and normal operation.
 
+.. note:: If a repository uses `Git LFS <https://git-lfs.com>`_ to store some of its files
+          (declared via ``filter=lfs`` entries in its ``.gitattributes``), the machine
+          downloading the descriptor also needs ``git-lfs`` installed and initialized
+          (``git lfs install``). If it isn't, Toolkit will raise an error rather than
+          silently checking out files that still contain unresolved LFS pointer text.
+
 
 Tracking against releases on Github
 ===================================
@@ -357,6 +363,13 @@ A token must be set as environment variable that is specific to the organization
 
 .. note:: For private repos, it's recommended that you use a personal access token (classic) with read-only access to Content. Fine-grained tokens are not yet supported. For more information, see the `Github Documentation on Personal Access Tokens <https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token>`_.
 
+.. note:: If the repository uses `Git LFS <https://git-lfs.com>`_, its
+          `"Include Git LFS objects in archives" <https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/managing-repository-settings/managing-git-lfs-objects-in-archives-of-your-repository>`_
+          setting must be enabled on Github. This descriptor downloads a Release's zip archive rather than
+          doing a git clone, and Github only includes real Git LFS content in that archive when this setting
+          is turned on; otherwise the downloaded files will contain unresolved LFS pointer text. This setting
+          isn't exposed through the Github API and must be checked/enabled manually per repository.
+
 
 Pointing to a path on disk
 ==========================