Download codeql/java-all in tests

An upcoming change in the CLI will require that the extensible
predicates that are targeted by a data extension needs to be available
in order for the `resolve extensions` command to succeed.

There are a handful of tests that are failing with this new CLI. This
change will update the tests so that the `codeql/java-all` pack is
available in the tests and ensures they pass.

Author: aeisenberg

extensions/ql-vscode/test/vscode-tests/cli-integration/data-extensions-editor/modeled-method-fs.test.ts

@@ -52,6 +52,14 @@ describe("modeled-method-fs", () => {
   let workspacePath: string;
   let cli: CodeQLCliServer;
 
+  beforeAll(async () => {
+    const extension = await getActivatedExtension();
+    cli = extension.cliServer;
+
+    // The java-all pack needs to be available for codeql resolve extensions to succeed.
+    await cli.packDownload(["codeql/java-all"]);
+  });
+
   beforeEach(async () => {
     // On windows, make sure to use a temp directory that isn't an alias and therefore won't be canonicalised by CodeQL.
     // See https://github.com/github/vscode-codeql/pull/2605 for more context.