Adding fix to clear logs before reboot for disk out of space issue (sonic-net#20323)

What is the motivation for this PR?
To proactively prevent disk space issues by cleaning up unnecessary log files in /host/logs_before_reboot during the disk space freeing step. This is especially useful before upgrades, where disk space can be a concern.

How did you do it?
Added the following line to the disk cleanup routine (typically found in the free_up_disk_space function):

exec_command(module, "rm -rf /host/logs_before_reboot/*", ignore_error=True)
This line is placed with other similar cleanup commands for logs, cores, dumps, etc.

How did you verify/test it?
Tested the updated cleanup routine in a testbed and verified that files in /host/logs_before_reboot are deleted as expected. Confirmed that the upgrade process proceeds with sufficient disk space and no residual log files.

Any platform specific information?
No platform-specific changes. This cleanup is safe for all platforms supported by SONiC testbed.

Supported testbed topology if it's a new test case?
Not a new test case. This is a framework/testbed maintenance improvement.

Documentation
No specific documentation updates are required for this change, as it is a maintenance step within the existing disk cleanup routine.

Author: ravaliyel

ansible/library/reduce_and_add_sonic_images.py

@@ -367,6 +367,7 @@ def get_disk_total_size(module):
         exec_command(module, "rm -f /var/core/*", ignore_error=True)
         exec_command(module, "rm -rf /var/dump/*", ignore_error=True)
         exec_command(module, "rm -rf /home/admin/*", ignore_error=True)
+        exec_command(module, "rm -rf /host/logs_before_reboot/*", ignore_error=True)
         latest_used_percent = get_disk_used_percent(module)
         log("Done free up, latest used percent: {}".format(latest_used_percent))
     else: