log: Logger should be indentified also by SchemeURL

[pellared]

From spec https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/bridge-api.md#get-a-logger:

Loggers are identified by name, version, and schema_url fields.

In code:

opentelemetry-go/log/internal/global/log.go

Lines 40 to 54 in bf06b80

	key := instLib{name, cfg.InstrumentationVersion()}
	if p.loggers == nil {
	l := &logger{name: name, options: options}
	p.loggers = map[instLib]*logger{key: l}
	return l
	}
	if l, ok := p.loggers[key]; ok {
	return l
	}
	l := &logger{name: name, options: options}
	p.loggers[key] = l
	return l

We are missing SchemeURL in the key.

Side note: There may be the same bug for other signals.

[pellared]

It looks like the same issue is for Tracer and Meter:

opentelemetry-go/internal/global/trace.go

Lines 104 to 107 in bf06b80

	type il struct {
	name string
	version string
	}

[MrAlias]

It looks like the same issue is for Tracer and Meter:

opentelemetry-go/internal/global/trace.go

Lines 104 to 107 in bf06b80

	type il struct {
	name string
	version string
	}

Please open issues to track these needed changes.