Add ability to export data to Grafana to front-end Go binary

Overview
Post 6.6.x cbbackupmgr creates stats files in the archive directory for useful debugging metrics:

• CPU utilization
• Memory
• Network
• Disk utilization

These will be created in ${ARCHIVE_PATH}/logs/stats under logical directory names (e.g. net/cpu). Each time you run a
command that collects stats, it generates a unix timestamp, and uses this in the filename for the stats file.

• That timestamp is logged ((Stats) Starting stat gathering - stat timestamp: %d)
• The same timestamp is used across different stats files, so can be used to group the stats for a given operation

As it stands, we don't have anything official which parses these files and converts them into a format that we can use
when debugging CBSEs.

Task

• Add ability to export processed data to Grafana to the binary created in MB-53837