Cirrus: Implement podman automation 2.0

Reimplement CI-automation to remove accumulated technical-debt and
optimize workflow.  The task-dependency graph designed goal was to
shorten it's depth and increase width (i.e. more parallelism).  A
reduction in redundant building (and 3rd party module download) was
also realized by caching `$GOPATH` and `$GOCACHE` early on.  This
cache is then reused in favor of a fresh clone of the repository
(when possible).

Note: The system tests typically execute MUCH faster than the
integration tests.  However, contrary to a fail-fast/fail-early
principal, they are executed last.  This was implemented due to
debug-ability related concerns/preferences of the primary
(golang-centric) project developers.

Signed-off-by: Chris Evich <cevich@redhat.com>

.golangci.yml

@@ -11,20 +11,32 @@ run:
     - pkg/varlink
     - pkg/varlinkapi
     - docs/varlink
+    - vendor
   skip-files:
     - iopodman.go
     - swagger.go
+  modules-download-mode: readonly
 linters:
   enable-all: true
   disable:
+    # All these break for one reason or another
     - dupl
     - funlen
     - gochecknoglobals
     - gochecknoinits
     - goconst
     - gocyclo
-    - gosec
+    - golint
     - lll
+    - structcheck
+    - typecheck
+    - unconvert
+    - varcheck
+    - deadcode
+    - depguard
+    - errcheck
+    - gocritic
+    - gosec
     - maligned
 linters-settings:
   errcheck: