[receiver/influxdbreceiver] Add the /ping endpoint for enhanced compatibility #29662
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Description: This PR supplements the receiver
influxdbreceiver
with an implementation of the/ping
endpoint. Various third-party applications use this to check the availability of the receiver before sending metrics, e.g. checkmk.Link to tracking Issue: #29594
Testing: Basic tests and end to end testing with the third party application checkmk.
Documentation: No additional documentation has been added.