test/e2e: do not use apk in builds

As far as I can tell there is no reason to use apk in these tests. They
just build an image and check for it and never use the installed binary.
Network calls are always unstable and therefore should be avoided when
possible, this ensures no/less flakes.

Fixes #16391

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

test/e2e/images_test.go

@@ -165,7 +165,7 @@ var _ = Describe("Podman images", func() {
 
 	It("podman images filter before image", func() {
 		dockerfile := `FROM quay.io/libpod/alpine:latest
-RUN apk update && apk add strace
+RUN echo hello > /hello
 `
 		podmanTest.BuildImage(dockerfile, "foobar.com/before:latest", "false")
 		result := podmanTest.Podman([]string{"images", "-q", "-f", "before=foobar.com/before:latest"})

test/e2e/play_build_test.go

@@ -78,13 +78,11 @@ status: {}
 
 	var playBuildFile = `
 FROM quay.io/libpod/alpine_nginx:latest
-RUN apk update && apk add strace
 LABEL homer=dad
 COPY copyfile /copyfile
 `
 	var prebuiltImage = `
 FROM quay.io/libpod/alpine_nginx:latest
-RUN apk update && apk add strace
 LABEL marge=mom
 `
 

test/e2e/prune_test.go

@@ -13,8 +13,8 @@ import (
 var pruneImage = fmt.Sprintf(`
 FROM  %s
 LABEL RUN podman --version
-RUN apk update
-RUN apk add bash`, ALPINE)
+RUN echo hello > /hello
+RUN echo hello2 > /hello2`, ALPINE)
 
 var emptyPruneImage = `
 FROM scratch