Report tools download durations on both download paths

The streaming path reported no timings at all, so we have no data for the
path that most runs take. It now reports a total duration, which is also
populated on the download-then-extract path.

That path additionally reports the extraction duration, which was
previously computed but only logged.

`downloadDurationMs` keeps its existing meaning of time spent downloading
alone, so existing telemetry stays comparable.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 628ce334-991a-4578-9c1b-93d2e96bbddb

src/setup-codeql.test.ts

@@ -234,6 +234,7 @@ test.serial(
       codeqlFolder: "codeql",
       statusReport: {
         downloadDurationMs: 200,
+        totalDurationMs: 300,
       },
       toolsVersion: LINKED_CLI_VERSION.cliVersion,
     });
@@ -286,6 +287,7 @@ test.serial(
       codeqlFolder: "codeql",
       statusReport: {
         downloadDurationMs: 200,
+        totalDurationMs: 300,
       },
       toolsVersion: expectedVersion,
     });