Hide copy and raw buttons in blob header

Issue:
https://gitlab.com/gitlab-org/gitlab/-/issues/335776

app/assets/javascripts/repository/components/blob_content_viewer.vue

@@ -116,6 +116,9 @@ export default {
     isLoading() {
       return this.$apollo.queries.project.loading || this.isLoadingLegacyViewer;
     },
+    isBinaryFileType() {
+      return this.isBinary || this.viewer.fileType === 'download';
+    },
     blobInfo() {
       const nodes = this.project?.repository?.blobs?.nodes;
 
@@ -169,7 +172,7 @@ export default {
       <blob-header
         :blob="blobInfo"
         :hide-viewer-switcher="!hasRichViewer || isBinary"
-        :is-binary="isBinary"
+        :is-binary="isBinaryFileType"
         :active-viewer-type="viewer.type"
         :has-render-error="hasRenderError"
         @viewer-changed="switchViewer"

spec/frontend/repository/components/blob_content_viewer_spec.js

@@ -349,15 +349,23 @@ describe('Blob content viewer component', () => {
       });
     });
 
-    it('passes the correct isBinary value to blob header when viewing a binary file', async () => {
+    describe('blob header binary file', () => {
+      it.each([richMockData, { simpleViewer: { fileType: 'download' } }])(
+        'passes the correct isBinary value when viewing a binary file',
+        async (blobInfo) => {
           fullFactory({
-        mockData: { blobInfo: richMockData, isBinary: true },
+            mockData: {
+              blobInfo,
+              isBinary: true,
+            },
             stubs: { BlobContent: true, BlobReplace: true },
           });
 
           await nextTick();
 
           expect(findBlobHeader().props('isBinary')).toBe(true);
+        },
+      );
     });
 
     describe('BlobButtonGroup', () => {