multi-asic support for config apply-patch and show runningconfig CLIs

[anamehra]

Description

sonic-mgmt testcase under generic_config_updater use config apply-patch for some of the test cases. config apply-patch does not handle multi-asic scenarios and that causes test cases to fail.

config apply-patch uses 'show runningconfig <>' command to fetch the running-config which also misses multi-asic support.

Steps to reproduce the issue:

Describe the results you received:

Describe the results you expected:

Output of show version:

(paste your output here)

Output of show techsupport:

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Additional information you deem important (e.g. issue happens only occasionally):

[anamehra]

@abdosi , FYI-

[abdosi]

@xincunli-sonic working on this. Please update this.

[xincunli-sonic]

1. Show runningconfiguration all change has merged in public repo and chassis repo
2. The supportive of multi asic GCU feature has merged into public repo and chassis repo, but since there were multiple YANG files missing and wrong fields, the corresponding changes have being made and on their way to repo.