Allow WAL-G tasks execution in check_mode

[vitabaks]

Added the check_mode: false parameter for the WAL-G tasks.

This ensures that the task executes even in --check mode, preventing it from being skipped and ensuring the file is downloaded. This change addresses an error where subsequent tasks fail due to the missing downloaded archive.

Fixed:

TASK [wal-g : Download WAL-G v3.0.3 binary] ************************************
changed: [10.0.0.5]
changed: [10.0.0.6]
changed: [10.0.0.7]
TASK [wal-g : Extract WAL-G into /tmp] *****************************************
fatal: [10.0.0.5]: FAILED! => {"changed": false, "msg": "Source '/tmp/wal-g-pg-ubuntu-20.04-amd64.tar.gz' does not exist"}
fatal: [10.0.0.7]: FAILED! => {"changed": false, "msg": "Source '/tmp/wal-g-pg-ubuntu-20.04-amd64.tar.gz' does not exist"}
fatal: [10.0.0.6]: FAILED! => {"changed": false, "msg": "Source '/tmp/wal-g-pg-ubuntu-20.04-amd64.tar.gz' does not exist"}
NO MORE HOSTS LEFT *************************************************************