Draw Navara world meshes in the overlay pass after tone mapping

Meshes now go through the same overlay as sprites and lines, so their
colours are the ones asked for without undoing the view's exposure. The
contract suite no longer carries the mesh colour check as a known
failure on Navara.

scripts/qa-contract-suite.mjs

@@ -237,12 +237,6 @@ async function runOn(browser, kind) {
           outcome.push({ name, skipped: owner[1] });
           continue;
         }
-        const knownFailure =
-          engine.kind === 'navara' &&
-          name ===
-            'meshes.createMesh: a single colour draws as asked within 10 per channel'
-            ? 'Meshes are drawn before tone mapping'
-            : null;
         try {
           await run();
           outcome.push({ name, ok: true });
@@ -250,10 +244,6 @@ async function runOn(browser, kind) {
           outcome.push({
             name,
             ok: false,
-            ...(knownFailure &&
-              String(error?.message).startsWith(
-                'mesh colour within 10 per channel',
-              ) && { knownFailure }),
             error: String(error?.message ?? error),
           });
         }