[Feature] Upgrade semconv to the new version

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open-telemetry-incubator/composer.json

Line 19 in cc4c5fe

"open-telemetry/sem-conv": "^1.27"

https://packagist.org/packages/open-telemetry/sem-conv#1.30.0

The latest version currently has been updated to 1.30.

PS: A comprehensive evaluation is needed, as the downstream of the ecosystem may not support `. (Refer to the official PHP or confirm after discussion.)

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Supplement: Once we determine the minimum version that we are compatible with, some attributes used in the project need to be set as "stable version", otherwise future adjustments may have disruptive changes.

ex: https://opentelemetry.io/docs/specs/semconv/http/http-spans/#http-client

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Some project references: https://github.com/open-telemetry/opentelemetry-php-contrib/tree/main/src/Instrumentation

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Additional information: open-telemetry/opentelemetry-php-contrib#327

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We finally decided to refer to the official community behavior of OpenTelemetry PHP, which is also solving the upgrade to 1.30.

So, this issue already has an answer.