Update upstream OpenTelemetry agent dependencies to 2.19.0 (#773)

* chore: Update upstream OpenTelemetry agent version and related depend...

... encies

Made with ❤️️ by updatecli

* chore: Update upstream OpenTelemetry agent version and related depend...

... encies

Made with ❤️️ by updatecli

* fix internal API change

* revert bad merge

---------

Co-authored-by: elastic-observability-automation[bot] <180520183+elastic-observability-automation[bot]@users.noreply.github.com>
Co-authored-by: Sylvain Juge <[email protected]>

Author: elastic-observability-automation[bot]

gradle/libs.versions.toml

@@ -11,11 +11,11 @@ opentelemetryProto = "1.3.2-alpha"
 
 # otel agent, we rely on the '*-alpha' and get the non-alpha dependencies transitively
 # updated from upstream agent with gradle/update-upstream.sh
-opentelemetryJavaagentAlpha = "2.18.1-alpha"
+opentelemetryJavaagentAlpha = "2.19.0-alpha"
 
 # otel contrib
 # updated from upstream agent with gradle/update-upstream.sh
-opentelemetryContribAlpha = "1.47.0-alpha"
+opentelemetryContribAlpha = "1.48.0-alpha"
 
 # otel semconv
 # updated from upstream agent with gradle/update-upstream.sh