Handle case when VirtualFile is null (#7156)

Closes sourcegraph/jetbrains#3087

During creation of TextEditorHighlightingPass VirtualFile can return
null. This PR handles this situation.

## Test plan
N/A
<!-- Required. See
https://docs-legacy.sourcegraph.com/dev/background-information/testing_principles.
-->

---------

Co-authored-by: Tomasz Gołębiowski <[email protected]>

.github/workflows/scip-java.yml

@@ -45,6 +45,8 @@ jobs:
           pushd jetbrains
           scip-java index --build-tool=gradle
           popd > /dev/null
+        env:
+          GITHUB_TOKEN: ${{ secrets.PRIVATE_SG_ACCESS_TOKEN }}
 
       - name: Install src
         run: yarn global add @sourcegraph/src

jetbrains/src/main/kotlin/com/sourcegraph/cody/inspections/CodyFixHighlightPass.kt

@@ -141,10 +141,12 @@ class CodyFixHighlightPass(val file: PsiFile, val editor: Editor) :
 class CodyFixHighlightPassFactory : TextEditorHighlightingPassFactoryRegistrar {
   private val factory: TextEditorHighlightingPassFactory =
       TextEditorHighlightingPassFactory { file, editor ->
-        when (file.virtualFile.fileSystem.protocol) {
-          "mock" -> null
-          else -> CodyFixHighlightPass(file, editor)
-        }
+        if (file.virtualFile == null) null
+        else
+            when (file.virtualFile.fileSystem.protocol) {
+              "mock" -> null
+              else -> CodyFixHighlightPass(file, editor)
+            }
       }
 
   override fun registerHighlightingPassFactory(