BUG #17647: 12.12 package has difference on ubuntu 18.04

The following bug has been logged on the website:

Bug reference:      17647
Logged by:          Mike Fröhner
Email address:      mikefroehner@gmx.de
PostgreSQL version: 12.12
Operating system:   Ubuntu 18.04
Description:

Hello,

today our CI noticed the upgrade of PostgreSQL to 12.12. We have a CI/CD
which tests our Puppet Module against Ubuntu 16./18./20./22.04. We run
different tests (kitchen-ci) including the following:
```
describe command('/usr/bin/sudo -u postgres psql -U myuser1 -h 127.0.0.1
mydb1 -c "CREATE TABLE foo (foo char);"') do
  its('exit_status') { should eq 0 }
  its('stdout') { should eq "CREATE TABLE\n" }
  its('stderr') { should eq '' }
end
```
Therefore we rollout a DB and a user via:
```
postgresql::databases:
  'mydb1':
    user: myuser1
    password: mypassword1
    host: 127.0.0.1/32
```
We also rollout a file:
```
  '/var/lib/postgresql/.pgpass':
    owner: postgres
    group: postgres
    mode: '0600'
    content: '*:*:*:myuser1:mypassword1'
    require_class: postgresql
```
This test only fails/times out on Ubuntu 18.04 because it is waiting for a
password input. With all other Ubuntu (16./20./22.04) this test succedds. Is
there anything wrong with my test or is the package for Ubuntu 18.04 broken?