Bug 1805128 - Update servo/webrender CI to pass again. r=jrmuizel

This updates the docker image used for CI on the github.com webrender
repository, so that updates to the WebRender code can continue to be
propagated to github.

Differential Revision: https://phabricator.services.mozilla.com/D164458

gfx/wr/.taskcluster.yml

@@ -42,7 +42,7 @@ tasks:
       $if: should_run
       then:
         # For the docker-worker tasks, the Docker image used
-        # (staktrace/webrender-test:debian-v9) was created using the Dockerfile in
+        # (staktrace/webrender-test:debian-v10) was created using the Dockerfile in
         # ci-scripts/docker-image.
         #
         # The docker image may need to be updated over time if the set of required
@@ -61,7 +61,7 @@ tasks:
           deadline: {$fromNow: '1 day'}
           payload:
             maxRunTime: 7200
-            image: 'staktrace/webrender-test:debian-v9'
+            image: 'staktrace/webrender-test:debian-v10'
             env:
               RUST_BACKTRACE: 'full'
               RUSTFLAGS: '--deny warnings'
@@ -90,7 +90,7 @@ tasks:
           deadline: {$fromNow: '1 day'}
           payload:
             maxRunTime: 7200
-            image: 'staktrace/webrender-test:debian-v9'
+            image: 'staktrace/webrender-test:debian-v10'
             env:
               RUST_BACKTRACE: 'full'
               RUSTFLAGS: '--deny warnings'

gfx/wr/ci-scripts/docker-image/setup.sh

@@ -37,7 +37,7 @@ apt-get install -y \
 
 # some reftests fail with freetype >= 2.10, so downgrade to the version in
 # Debian buster. See bug 1804782.
-apt-get remove libfreetype-dev
+apt-get -y remove libfreetype-dev
 curl -LO http://snapshot.debian.org/archive/debian/20220718T031307Z/pool/main/f/freetype/libfreetype6_2.9.1-3%2Bdeb10u3_amd64.deb
 curl -LO http://snapshot.debian.org/archive/debian/20220718T031307Z/pool/main/f/freetype/libfreetype6-dev_2.9.1-3%2Bdeb10u3_amd64.deb