ci: Use rpm instead of dnf to remove blivet in Anaconda tests

DNF will also remove blivet-gui which is needed for the Anaconda
tests.

.github/workflows/anaconda_tests.yml

@@ -41,7 +41,7 @@ jobs:
           # - Run Anaconda tests.
           podman run -i --rm -v ./blivet:/blivet:z -v ./anaconda:/anaconda:z quay.io/rhinstaller/anaconda-ci:$TARGET_BRANCH sh -c " \
               set -xe; \
-              dnf remove -y python3-blivet; \
+              rpm -e --nodeps python3-blivet blivet-data; \
               dnf install -y python3-blockdev libblockdev-plugins-all python3-bytesize libbytesize python3-pyparted python3-libmount parted libselinux-python3; \
               cd /blivet; \
               python3 ./setup.py install; \