Add nutanix input plugin to collect metrics from Nutanix Prism Centra… (#104)

issue #103

## Summary
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Explain here the why, the rationale and motivation, for the changes.
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Add nutanix input plugin to collect metrics from Nutanix Prism Central

## Checklist
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the []:
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- [x] No AI generated code was used in this PR
- [x] Updated associated README.md.
- [x] Pull request title or commits are in [conventional commit
format](https://www.conventionalcommits.org/en/v1.0.0/#summary)

## Related issues
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resolves

Author: snetsystems

plugins/inputs/all/nutanix.go

@@ -0,0 +1,5 @@
+//go:build !custom || inputs || inputs.nutanix
+
+package all
+
+import _ "github.com/influxdata/telegraf/plugins/inputs/nutanix" // register plugin