Roll CAS Client from 4d27bf4863b7 to 5849a0d29a3f

https://chromium.googlesource.com/infra/infra.git/+log/4d27bf4863b7..5849a0d29a3f

2021-07-27 bryner@google.com Also disable flex on Mac.
2021-07-27 chromium-autoroll@skia-public.iam.gserviceaccount.com Roll chromiumos/config from 65ab5cc21e71 to 975d599f1bf4 (2 revisions)
2021-07-27 gbeaty@chromium.org Split the Bootstrapper type into multiple types.
2021-07-27 chromium-autoroll@skia-public.iam.gserviceaccount.com Roll chromiumos/config from 835696a76fb5 to 65ab5cc21e71 (2 revisions)
2021-07-27 jackneus@google.com Switch setup_project to use its own OAuth ClientID
2021-07-27 chromium-autoroll@skia-public.iam.gserviceaccount.com Roll luci-go from e742cf6d8d11 to cd4ffe738430 (1 revision)
2021-07-27 chromium-autoroll@skia-public.iam.gserviceaccount.com Roll luci-go from 5c209a11c4a4 to e742cf6d8d11 (1 revision)
2021-07-27 chromium-autoroll@skia-public.iam.gserviceaccount.com Roll luci-go from 977fe46b68ee to 5c209a11c4a4 (1 revision)
2021-07-27 chromium-autoroll@skia-public.iam.gserviceaccount.com Roll luci-go from f7ee62f1a958 to 977fe46b68ee (1 revision)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/cas-recipes-py
Please CC tikuta@chromium.org,jwata@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: tikuta@chromium.org,jwata@google.com
Change-Id: I2c4b3f0e0ceecef8c00d2e2145e68c787127bc15
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/recipes-py/+/3055168
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/recipe_modules/cas/resources/infra.sha1 b/recipe_modules/cas/resources/infra.sha1
index 8c656ba..a42d206 100644
--- a/recipe_modules/cas/resources/infra.sha1
+++ b/recipe_modules/cas/resources/infra.sha1
@@ -1 +1 @@
-git_revision:04c7051e7a02d7000bf28b53a575fea10220b555
+git_revision:5849a0d29a3f93d443aed06d902443c4fb582df3