[gnoi] file: implement Get in-house using /mnt/host#698

hdwhdw wants to merge 2 commits into

sonic-net:mastersonic-net/sonic-gnmi:masterfrom

hdwhdw:daweihuang/gnoi-file-get-inhousehdwhdw/sonic-gnmi:daweihuang/gnoi-file-get-inhouseCopy head branch name to clipboard