[antlir2][rpms] add git-lfs to broken scripts list

Summary:
`git` only comes from `fb-git-wrapper` on centos8 - even if we install
`fb-git-wrapper` in the parent_layer it doesn't work because
`/usr/local/fbcode` is not mounted into the `installroot`

`git-lfs` can be installed fine on centos9, so we likely can just ignore it
until centos8 is gone

Test Plan: testhard

Reviewed By: naveedgol

Differential Revision: D51484505

fbshipit-source-id: bc8b94a76c545a4e62b3e56ecf3d51ecb9c0115f

antlir/antlir2/package_managers/dnf/build_appliance/driver.py

@@ -98,6 +98,7 @@ def package_struct(pkg):
 # removed when the task is fixed.
 _RPMS_THAT_CAN_FAIL_POST_SCRIPTS = {
     "antlir2-failing-postscripts": "TODO(T166162108)",
+    "git-lfs": "TODO(T170621965)",
     "nsight-compute-2019.4.0": "TODO(T166170831)",
 }