fix up ghcr client tests and remove config from action package layers

__tests__/main.test.ts

@@ -495,7 +495,7 @@ describe('run', () => {
         expect(blobs.has('123')).toBeTruthy()
         expect(blobs.has('1234')).toBeTruthy()
         expect(manifest.mediaType).toBe(ociContainer.imageManifestMediaType)
-        expect(manifest.layers.length).toBe(3)
+        expect(manifest.layers.length).toBe(2)
         expect(manifest.annotations['com.github.package.type']).toBe(
           ociContainer.actionPackageAnnotationValue
         )
@@ -585,7 +585,6 @@ describe('run', () => {
     uploadOCIImageManifestMock.mockImplementation(
       (token, registry, repository, manifest, blobs, tag) => {
         let expectedBlobKeys: string[] = []
-        let expectedLayers = 0
         let expectedAnnotationValue = ''
         let expectedTagValue: string | undefined = undefined
         let returnValue = ''
@@ -599,13 +598,11 @@ describe('run', () => {
           )
 
           expectedBlobKeys = [sigStoreLayer.digest, ociContainer.emptyConfigSha]
-          expectedLayers = 1
           returnValue = 'sha256:attestation-digest'
         } else {
           expectedAnnotationValue = ociContainer.actionPackageAnnotationValue
           expectedTagValue = '1.2.3'
           expectedBlobKeys = ['123', '1234', ociContainer.emptyConfigSha]
-          expectedLayers = 3
           returnValue = 'sha256:my-test-digest'
         }
 
@@ -617,7 +614,7 @@ describe('run', () => {
           expectedAnnotationValue
         )
         expect(tag).toBe(expectedTagValue)
-        expect(manifest.layers.length).toBe(expectedLayers)
+        expect(manifest.layers.length).toBe(expectedBlobKeys.length - 1) // Minus config layer
         expect(blobs.size).toBe(expectedBlobKeys.length)
         for (const expectedBlobKey of expectedBlobKeys) {
           expect(blobs.has(expectedBlobKey)).toBeTruthy()

__tests__/oci-container.test.ts

@@ -16,7 +16,7 @@ describe('sha256Digest', () => {
     const { manifest } = testActionPackageManifest()
     const digest = sha256Digest(manifest)
     const expectedDigest =
-      'sha256:dd8537ef913cf87e25064a074973ed2c62699f1dbd74d0dd78e85d394a5758b5'
+      'sha256:1af9bf993bf068a51fbb54822471ab7507b07c553bcac09a7c91328740d8ed69'
 
     expect(digest).toEqual(expectedDigest)
   })
@@ -26,7 +26,7 @@ describe('size', () => {
   it('returns the total size of the provided manifest', () => {
     const { manifest } = testActionPackageManifest()
     const size = sizeInBytes(manifest)
-    expect(size).toBe(1133)
+    expect(size).toBe(991)
   })
 })
 
@@ -44,11 +44,6 @@ describe('createActionPackageManifest', () => {
                 "digest":"sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a"
             },
             "layers":[
-                {
-                  "mediaType":"application/vnd.oci.empty.v1+json",
-                  "size":2,
-                  "digest":"sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a"
-                },
                 {
                     "mediaType":"application/vnd.github.actions.package.layer.v1.tar+gzip",
                     "size":${tarFile.size},