Cirrus: Use config. in common with all repos.

These changes bring the YAML configuration and testing-image in-line
with practices and format used by all other containers-org. repos.  The
intention is to make it easier to maintain by maintaining configuration
and behavior hegemony.  Also, besides limiting flakes and surprises,
utilizing a pre-built container image avoids wasting time installing
packages at runtime.  Lastly, remove resource constraints on containers
so they operate with the maximum available.   This is more practical,
given there is but a single testing task and no parallelism is needed.

Signed-off-by: Chris Evich <[email protected]>

.cirrus.yml

@@ -1,39 +1,56 @@
 ---
 
-testing_task:
+# Main collection of env. vars to set for all tasks and scripts.
+env:
+    ####
+    #### Global variables used for all tasks
+    ####
+    # Overrides default location (/tmp/cirrus) for repo clone
+    GOPATH: &gopath "/var/tmp/go"
+    GOBIN: "${GOPATH}/bin"
+    GOCACHE: "${GOPATH}/cache"
+    GOSRC: &gosrc "/var/tmp/go/src/github.com/containers/common"
+    CIRRUS_WORKING_DIR: *gosrc
+    # The default is 'sh' if unspecified
+    CIRRUS_SHELL: "/bin/bash"
+
+    ####
+    #### image names to test with (double-quotes around names are critical)
+    ####
+    FEDORA_NAME: "fedora-34"
+    IMAGE_SUFFIX: "c6032583541653504"
+    FEDORA_CONTAINER_FQIN: "quay.io/libpod/fedora_podman:${IMAGE_SUFFIX}"
+
+
+# Default, hard-coded max timeout is 2-hours.
+timeout_in: 30m  # no need to wait 2-hours before timing out
+
 
-  env:
-    GOPATH: "/go"
-    CIRRUS_WORKING_DIR: "${GOPATH}/src/github.com/containers/common"
-    GOSRC: "$CIRRUS_WORKING_DIR"
+testing_task:
+  alias: testing
+  name: "Testing on $FEDORA_NAME"
 
   container:
-    image: "registry.fedoraproject.org/fedora:34"
-    cpu: 2
-    memory: 2
+    image: "${FEDORA_CONTAINER_FQIN}"
 
   test_script:
-    - dnf install -y go containers-common device-mapper-devel libseccomp-devel btrfs-progs-devel
     - make vendor
     - make build
     - make install.tools
     - make validate
     - make test
 
 
+# Status aggregator for all tests.  This task simply ensures a defined
+# set of tasks all passed, and allows confirming that based on the status
+# of this task.
 success_task:
 
-    # This task is a required-pass in github settings,
-    # it blocks PRs from merging if a depends_on task fails
-    only_if: $CIRRUS_BRANCH != $DEST_BRANCH
-
-    # ignores any dependent task conditions
     depends_on:
         - "testing"
 
     container:
-        # Note: Image has dual purpose, see contrib/gate/README.md
-        image: "quay.io/libpod/gate:master"
-        cpu: 1
-        memory: 1
+        image: "${FEDORA_CONTAINER_FQIN}"
 
+    clone_script: &noop mkdir -p "$CIRRUS_WORKING_DIR"
+    script: *noop