ipatests: Ignore warnings on failed to read files on tarring

There are tons of useless warnings about missing files on collecting
logs, such as:

```
tar: /var/log/ipaserver-kra-install.log: Warning: Cannot stat: No such file or directory
tar: /var/log/ipaepn.log: Warning: Cannot stat: No such file or directory
tar: /etc/NetworkManager/NetworkManager.conf: Warning: Cannot stat: No such file or directory
tar: /var/log/ipabackup.log: Warning: Cannot stat: No such file or directory
tar: /var/log/iparestore.log: Warning: Cannot stat: No such file or directory
...

```

Since `--ignore-failed-read` option is passed to tar the caller
doesn't care about not readable(mostly missing) files and these warnings
may be filtered out.

This improves the readability of test logs.

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipatests/azure/scripts/azure-run-base-tests.sh

@@ -14,6 +14,7 @@ function collect_logs() {
     printf "Collecting logs\n"
     journalctl -b --no-pager > systemd_journal.log
     tar --ignore-failed-read -czf "$out_file" \
+        --warning=no-failed-read  \
         /var/log/dirsrv \
         "$HTTPD_LOGDIR" \
         /var/log/ipa* \

ipatests/azure/templates/test-jobs.yml

@@ -93,7 +93,7 @@ steps:
     printf "SECCOMP:\n"
     grep ' SECCOMP ' "$HOST_JOURNAL" && \
         emit_warning "There are reported SECCOMP syscalls. Please, check the logs."
-    tar --ignore-failed-read -czf "$HOST_JOURNAL_PATH" "$HOST_JOURNAL"
+    tar -czf "$HOST_JOURNAL_PATH" "$HOST_JOURNAL"
   condition: succeededOrFailed()
   displayName: Host's systemd journal
 

ipatests/pytest_ipa/integration/__init__.py

@@ -218,9 +218,17 @@ def collect_logs(name, logs_dict, logfile_dir=None, beakerlib_plugin=None):
             tmpname = cmd.stdout_text.strip()
             # Tar up the logs on the remote server
             cmd = host.run_command(
-                ['tar', 'cJvf', tmpname, '--ignore-failed-read',
-                 '--dereference'] + logs,
-                log_stdout=False, raiseonerr=False)
+                [
+                    "tar",
+                    "cJvf",
+                    tmpname,
+                    "--ignore-failed-read",
+                    "--warning=no-failed-read",
+                    "--dereference",
+                ] + logs,
+                log_stdout=False,
+                raiseonerr=False,
+            )
             if cmd.returncode:
                 logger.warning('Could not collect all requested logs')
             # fetch tar file