CI:tests: Disable NETPLAN_PARSER_IGNORE_ERRORS by default

It's taking lots of compute time in upstream and downstream CI systems.
We still keep it on inside our `autopkgtest.yml` CI test, but turn it off
by default otherwise.

.github/workflows/autopkgtest.yml

@@ -54,5 +54,7 @@ jobs:
           dch -v "$VER" "Autopkgtest CI testing (Noble)"
       - name: Run autopkgtest (incl. build)
         run: |
-          autopkgtest . \
-            -U --env=DPKG_GENSYMBOLS_CHECK_LEVEL=0 -- lxd autopkgtest/ubuntu/noble/amd64
+          autopkgtest . -U \
+            --env=DPKG_GENSYMBOLS_CHECK_LEVEL=0 \
+            --env=NETPLAN_PARSER_IGNORE_ERRORS=1 \
+            -- lxd autopkgtest/ubuntu/noble/amd64

tests/integration/run.py

@@ -78,7 +78,7 @@ def dedupe(duped_list):
 
 os.environ["NETPLAN_TEST_BACKENDS"] = ",".join(backends)
 
-run_with_ignore_errors = os.environ.get("NETPLAN_PARSER_IGNORE_ERRORS", "1")
+run_with_ignore_errors = os.environ.get("NETPLAN_PARSER_IGNORE_ERRORS", "0")
 
 returncode = 0
 for test in requested_tests: