fix: do not fail the job when if: false (#172)

- log job result as info not as debug
- add test

---

v6.4.0 regression introduced in 4880b091a2

It did not fail a test because the [original fix](https://code.forgejo.org/forgejo/act/pulls/67/files)  has tests only for the case where a step is skipped, not when a job is skipped.

Closes forgejo/runner#660

Reviewed-on: https://code.forgejo.org/forgejo/act/pulls/172
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>

act/runner/testdata/skipjob/skipjob.yml

@@ -0,0 +1,11 @@
+name: skipjob
+on: push
+
+jobs:
+  checkjob:
+    runs-on: ubuntu-latest
+
+    if: false
+
+    steps:
+      - run: echo nothing

act/runner/testdata/skipstep/skipstep.yml

@@ -1,8 +1,8 @@
-name: skip
+name: skipstep
 on: push
 
 jobs:
-  check:
+  checkstep:
     runs-on: ubuntu-latest
     steps:
       - if: false