ci(portal): drop hashFiles job gate (act_runner doesn't evaluate it)

Gitea's act_runner doesn't evaluate hashFiles() at job-level if:
conditions, so the gate I added in M0.2 universally skipped the test
job even when package.json was committed. Drop it for portal —
package.json is a permanent fixture in this repo so we always want
test + e2e to run. e2e/image jobs keep their other conditions
(push-to-main, etc.)

Refs: M5.1

.gitea/workflows/ci.yaml

@@ -57,7 +57,7 @@ jobs:
 
   test:
     runs-on: docker
-    if: hashFiles('package.json') != ''
+
     steps:
       - uses: actions/checkout@v4