Correct OTel endpointAddress argument (it's not a URL) [v1.13 update]

[andrejpk]

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Description

The Tracing docs imply that you should use a URL in tracing.otel.endpointAddress but it's looking for a hostname or hostname:port

Issue reference

#4068

[github-actions]

Stale PR, paging all reviewers

[KrylixZA]

Thanks for this. Tripped me up for a while. I was doing what the docs told me to do but the app was telling me I had too many slashes. Neither was informative of what was incorrectly configured. This should clarify things.