Fix plugin filters when using telegraf config

[sspaink]

The following command currently doesn't work:
telegraf config --input-filter cpu --output-filter influxdb

Instead you have to use telegraf --input-filter cpu --output-filter influxdb config

Telegraf should be updated to have the command be at the beginning

--sample-config should probably be deprecated as well in favor of config

Related to: #10831

Steps to reproduce

Run telegraf config --input-filter cpu --output-filter influxdb
Nothing gets filtered

Expected behavior

Plugins get filtered

Actual behavior

Plugins aren't filtered

[powersj]

next steps: look into what change may have caused this, as it was previously working