puppet: process_fts_updates connects as nagios (or provided username).

It should not use the configured zulip username, but should instead
pull from the login user (likely `nagios`), or an explicit alternate
provided PostgreSQL username.  Failure to do so results in Nagios
failures because the `nagios` login does not have permissions to
authenticated the `zulip` PostgreSQL user.

This requires CI changes, as the install tests install as the `zulip`
login username, which allowed Nagios tests to pass previously; with
the custom database and username, however, they must be passed to
process_fts_updates explicitly when validating the install.

.github/workflows/production-suite.yml

@@ -194,7 +194,7 @@ jobs:
           sudo /tmp/production-install ${{ matrix.extra-args }}
 
       - name: Verify install
-        run: sudo /tmp/production-verify
+        run: sudo /tmp/production-verify ${{ matrix.extra-args }}
 
       - name: Install pgroonga
         if: ${{ matrix.is_bionic }}
@@ -202,7 +202,7 @@ jobs:
 
       - name: Verify install after installing pgroonga
         if: ${{ matrix.is_bionic }}
-        run: sudo /tmp/production-verify
+        run: sudo /tmp/production-verify ${{ matrix.extra-args }}
 
       - name: Upgrade postgresql
         if: ${{ matrix.is_bionic }}
@@ -210,7 +210,7 @@ jobs:
 
       - name: Verify install after upgrading postgresql
         if: ${{ matrix.is_bionic }}
-        run: sudo /tmp/production-verify
+        run: sudo /tmp/production-verify ${{ matrix.extra-args }}
 
       - name: Report status
         if: failure()