cosign: clear errors if manifest or bundle payload found

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

src/cosign/cosign.ts

@@ -142,15 +142,12 @@ export class Cosign {
         bundlePayload = obj as SerializedBundle;
       }
 
-      if (bundlePayload && signatureManifestDigest) {
+      if (bundlePayload && (signatureManifestDigest || signatureManifestFallbackDigest)) {
+        errors = undefined; // clear errors if we have both payload and manifest digest
         break;
       }
     }
 
-    if (!errors && !bundlePayload) {
-      throw new Error(`Cannot find signature bundle from cosign command output: ${logs}`);
-    }
-
     return {
       bundle: bundlePayload,
       signatureManifestDigest: signatureManifestDigest || signatureManifestFallbackDigest,