Add container rsyslog.conf to the sys dump

[vivekrnv]

What I did

Added a new directory to generate_dump for collecting any container specific config files etc to the sys dump. For now only the rsyslog.conf is added

How I did it

How to verify it

Run the dump and see if the rsyslogd files are present

root@r-leopard-41:/home/admin# tree -a sonic_dump_r-leopard-41_20230815_013600/dump/container_dumps/
sonic_dump_r-leopard-41_20230815_013600/dump/container_dumps/
├── bgp
│   └── rsyslog.conf
├── database
│   └── rsyslog.conf
├── dhcp_relay
│   └── rsyslog.conf
├── eventd
│   └── rsyslog.conf
├── lldp
│   └── rsyslog.conf
├── mgmt-framework
│   └── rsyslog.conf
├── pmon
│   └── rsyslog.conf
├── radv
│   └── rsyslog.conf
├── snmp
│   └── rsyslog.conf
├── swss
│   └── rsyslog.conf
├── syncd
│   └── rsyslog.conf
├── teamd
│   └── rsyslog.conf
└── telemetry
    └── rsyslog.conf

13 directories, 13 files

Tested branch (Please provide the tested image version)

• 202305 commit sonic-net/sonic-buildimage@40d1159

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

[dgsudharsan]

@StormLiangMS This is debug the issues sonic-net/sonic-buildimage#15152 sonic-net/sonic-buildimage#17172 and today we lack critical information in containers.

[StormLiangMS]

LGTM