ci(macos): no fast tests on macOS package building

We don't run complete tests in CI, so let's not waste this chance. The
overhead for complete tests is minimal compared to all the pipeline
boilerplate.

Author: dvarrazzo

.github/workflows/packages.yml

@@ -179,7 +179,6 @@ jobs:
             PG_VERSION=16
             PACKAGE_NAME=psycopg2-binary
             PSYCOPG2_TESTDB=postgres
-            PSYCOPG2_TEST_FAST=1
             PATH="/tmp/libpq.build/bin:$PATH"
 
       - name: Upload artifacts