Port cyclonedx presenter to format object (#589)

* add new cyclonedx format object

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* remove cyclonedx presenter

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* remove cyclonedx presenter call

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* remove dependence on golden images for format tests

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* wire up new formt + rename all-presenters ref

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* add CLI test to ensure that all formats can be expressed as report output

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* add cyclonedx version and encoding format to package name

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* optionally preserve format snapshot images

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix linting + text unit tests

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

test/cli/all_formats_expressible_test.go

@@ -0,0 +1,35 @@
+package cli
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/anchore/syft/syft/format"
+)
+
+func TestAllFormatsExpressible(t *testing.T) {
+	commonAssertions := []traitAssertion{
+		func(tb testing.TB, stdout, _ string, _ int) {
+			tb.Helper()
+			if len(stdout) < 1000 {
+				tb.Errorf("there may not be any report output (len=%d)", len(stdout))
+			}
+		},
+		assertSuccessfulReturnCode,
+	}
+
+	for _, o := range format.AllOptions {
+		t.Run(fmt.Sprintf("format:%s", o), func(t *testing.T) {
+			cmd, stdout, stderr := runSyft(t, nil, "dir:./test-fixtures/image-pkg-coverage", "-o", string(o))
+			for _, traitFn := range commonAssertions {
+				traitFn(t, stdout, stderr, cmd.ProcessState.ExitCode())
+			}
+			if t.Failed() {
+				t.Log("STDOUT:\n", stdout)
+				t.Log("STDERR:\n", stderr)
+				t.Log("COMMAND:", strings.Join(cmd.Args, " "))
+			}
+		})
+	}
+}