Apply the same logic to all metric type for Hostname prefixing

[uepoch]

Use EnableHostname boolean in all types of metrics instead of just gauges

[uepoch]

hello @banks ! Just added tests, ready to go from my POV

[uepoch]

Do you need any more information ?

[uepoch]

Hello @banks, sorry for HLing again :( , did you had the time to look at this review ?

Should I remove the safeguard ?

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