[action] [PR:16775] Revert "Move /var/log to RAM for Mellanox SN2700, Nokia 7215 and Dell S6100

[mssonicbld]

This reverts commit 05f326e.

Why I did it

Mellanox raised concerns about PR15077. So, we need to revert it.

Work item tracking

• Microsoft ADO 25355843:

How I did it

By calling git revert on commit SHA 05f326e, which is PR #15077 , and fixing merge conflicts on Dell's installer.conf file.

How to verify it

Check that the files modified by aforementioned PR does not have log_inram config.
Build and flash images with this config then verify the following:

Dell S6100

admin@str3-s6100-acs-7:~$ df -h | grep -i '/var/log'
/dev/loop1 3.9G 13M 3.7G 1% /var/log
admin@str3-s6100-acs-7:~$

admin@str3-s6100-acs-7:~$ free -h
 total used free shared buff/cache available
Mem: 7.7Gi 1.6Gi 4.8Gi 49Mi 1.4Gi 5.9Gi
Swap: 0B 0B 0B
admin@str3-s6100-acs-7:~$

Mellanox SN2700

admin@str-msn2700-22:~$ df -h | grep -i '/var/log'
/dev/loop1 3.9G 198M 3.5G 6% /var/log
admin@str-msn2700-22:~$

admin@str-msn2700-22:~$ free -h
 total used free shared buff/cache available
Mem: 7.7Gi 2.7Gi 3.5Gi 141Mi 1.5Gi 4.7Gi
Swap: 0B 0B 0B
admin@str-msn2700-22:~$

Nokia 7215

admin@str2-7215-acs-1:~$
admin@str2-7215-acs-1:~$ df -h | grep -i '/var/log'
/dev/loop1 3.9G 856K 3.7G 1% /var/log
admin@str2-7215-acs-1:~$

admin@str2-7215-acs-1:~$ free -h
 total used free shared buff/cache available
Mem: 3.0Gi 592Mi 1.8Gi 7.0Mi 560Mi 2.3Gi
Swap: 0B 0B 0B
admin@str2-7215-acs-1:~$

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211
• 202305

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[mssonicbld]

Original PR: #16775