Merged PR 772926: Avoid including internal packages for Microsoft.Cache.Libraries

- For external bxl packages these dependencies wouldn't be used anyways, so we'll avoid including references for these for now.

Related work items: #2157947

Public/Src/Deployment/NugetPackages.dsc

@@ -501,9 +501,11 @@ namespace NugetPackages {
             // ...importFrom("BuildXL.Cache.ContentStore").withQualifier(net472packageQualifier).getProtobufNetPackages(false),
             ...importFrom("BuildXL.Cache.ContentStore").withQualifier(net472packageQualifier).getSerializationPackagesWithoutNetStandard(),
             ...importFrom("BuildXL.Cache.ContentStore").withQualifier(net472packageQualifier).getSystemTextJsonWithoutNetStandard(),
-            importFrom("Microsoft.VisualStudio.Services.ArtifactServices.Shared").withQualifier(net472packageQualifier).pkg,
-            importFrom("Microsoft.VisualStudio.Services.ArtifactServices.Shared").withQualifier(net6PackageQualifier).pkg,
-            importFrom("Microsoft.VisualStudio.Services.BlobStore.Client").withQualifier(net472packageQualifier).pkg,
+            ...addIfLazy(BuildXLSdk.Flags.isMicrosoftInternal, () => [
+                importFrom("Microsoft.VisualStudio.Services.ArtifactServices.Shared").withQualifier(net472packageQualifier).pkg,
+                importFrom("Microsoft.VisualStudio.Services.ArtifactServices.Shared").withQualifier(net6PackageQualifier).pkg,
+                importFrom("Microsoft.VisualStudio.Services.BlobStore.Client").withQualifier(net472packageQualifier).pkg,
+            ]),
             ...importFrom("Sdk.Selfhost.RocksDbSharp").withQualifier(net472packageQualifier).getRocksDbPackagesWithoutNetStandard(),
             importFrom("NLog").withQualifier(net472packageQualifier).pkg,
             importFrom("Polly").withQualifier(net472packageQualifier).pkg,