fixed initialism errors in accordance with golang conventions in 7 files. (#24287)

server/channels/app/import_functions_test.go

@@ -4189,7 +4189,7 @@ func TestImportImportEmoji(t *testing.T) {
 	data = imports.EmojiImportData{Name: ptrStr(model.NewId()), Image: ptrStr(largeImage)}
 	appErr = th.App.importEmoji(th.Context, &data, false)
 	require.NotNil(t, appErr)
-	require.ErrorIs(t, appErr.Unwrap(), utils.SizeLimitExceeded)
+	require.ErrorIs(t, appErr.Unwrap(), utils.ErrSizeLimitExceeded)
 }
 
 func TestImportAttachment(t *testing.T) {

server/channels/app/post_metadata_test.go

@@ -2473,7 +2473,7 @@ func TestGetLinkMetadata(t *testing.T) {
 		assert.Nil(t, img)
 		assert.Error(t, err)
 		assert.IsType(t, &url.Error{}, err)
-		assert.Equal(t, httpservice.AddressForbidden, err.(*url.Error).Err)
+		assert.Equal(t, httpservice.ErrAddressForbidden, err.(*url.Error).Err)
 
 		requestURL = th.App.GetSiteURL() + "/api/v4/image?url=" + url.QueryEscape(requestURL)