[Monitor]Fix monitor output table tsv

[mmyyrroonn]

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Fix #936
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[azuresdkci]

If this PR is for a new extension or change to an existing extension, use the following to try out the changes in this PR:

docker run -it microsoft/azure-cli:latest
export EXT=<NAME>
pip install --upgrade --target ~/.azure/cliextensions/$EXT "git+https://github.com/MyronFanQiu/azure-cli-extensions.git@fix-monitor-output-table-tsv#subdirectory=src/$EXT&egg=$EXT"

[yonzhan]

@myronfanqiu please take a look.

[zikalino]

@myronfanqiu Please fix this and it will be good to merge:

C: 25,12: Consider using enumerate instead of iterating with range and len (consider-using-enumerate)

[alexeldeib]

@myronfanqiu thanks for the work, will be happy to get this in 🙂