Update the span name format for gin-gonic/gin to the latest semconv

[minimAluminiumalism]

Problem Statement

According to the latest semconv of http:

HTTP span names SHOULD be {method} {target} if there is a (low-cardinality) target available. If there is no (low-cardinality) {target} available, HTTP span names SHOULD be {method}.

Currently the span name of gin-gonic/gin instrumetation is still http.route(or URL path) like following(instrumentation/github.com/gin-gonic/gin/otelgin/example):

Maybe we should update the span name format?

If needed I can submit a PR to fix that.

Proposed Solution

Add request method to span name.

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[MrAlias]

cc @akats7

[akats7]

Hi @minimAluminiumalism, thanks for this issue. This seems tied to this PR #6381 that should update the default span name format from just using the full path