Sebastiaan van Stijn c207947508 integration-cli: DockerPluginSuite: use gotest.tools compare utilities ...

Some of these tests are failing (but not enabled in CI), but the current output
doesn't provide any details on the failure, so this patch is just to improve the
test output to allow debugging the actual failure.

Before this, tests would fail like:

    make BIND_DIR=. TEST_FILTER=TestPluginInstallImage test-integration
    ...
    === FAIL: amd64.integration-cli TestDockerPluginSuite/TestPluginInstallImage (15.22s)
        docker_cli_plugins_test.go:220: assertion failed: expression is false: strings.Contains(out, `Encountered remote "application/vnd.docker.container.image.v1+json"(image) when fetching`)
        --- FAIL: TestDockerPluginSuite/TestPluginInstallImage (15.22s)

With this patch, tests provide more useful output:

    make BIND_DIR=. TEST_FILTER=TestPluginInstallImage test-integration
    ...
    === FAIL: amd64.integration-cli TestDockerPluginSuite/TestPluginInstallImage (1.15s)
    time="2022-10-18T10:21:22Z" level=warning msg="reference for unknown type: application/vnd.docker.plugin.v1+json"
    time="2022-10-18T10:21:22Z" level=warning msg="reference for unknown type: application/vnd.docker.plugin.v1+json" digest="sha256:bee151d3fef5c1f787e7846efe4fa42b25a02db4e7543e54e8c679cf19d78598"
mediatype=application/vnd.docker.plugin.v1+json size=522
    time="2022-10-18T10:21:22Z" level=warning msg="reference for unknown type: application/vnd.docker.plugin.v1+json"
    time="2022-10-18T10:21:22Z" level=warning msg="reference for unknown type: application/vnd.docker.plugin.v1+json" digest="sha256:bee151d3fef5c1f787e7846efe4fa42b25a02db4e7543e54e8c679cf19d78598"
mediatype=application/vnd.docker.plugin.v1+json size=522
        docker_cli_plugins_test.go:221: assertion failed: string "Error response from daemon: application/vnd.docker.distribution.manifest.v1+prettyjws not supported\n" does not contain "Encountered remote
\"application/vnd.docker.container.image.v1+json\"(image) when fetching"
        --- FAIL: TestDockerPluginSuite/TestPluginInstallImage (1.15s)

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

2022-11-01 17:27:18 +01:00

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