[Release-2.74] Cherry-pick #38518 into release branch

[Abacn]

• Fix opentelemetry version

• Fix target platform version to be 11

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[gemini-code-assist]

Summary of Changes

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This pull request backports critical configuration updates to the 2.74 release branch. The changes focus on standardizing the Java target platform to version 11 and refining OpenTelemetry dependency management to ensure consistent versioning across the project.

Highlights

• OpenTelemetry Versioning: Updated OpenTelemetry dependency management to rely on the opentelemetry-bom instead of the Google Cloud Platform BOM, and explicitly set the version for the opentelemetry-context dependency.
• Java Target Platform: Updated the target Java platform version from 1.8 to 11 across various build configurations, codestyle settings, and archetype templates.

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[gemini-code-assist]

Code Review

This pull request upgrades the project's Java version from 8 to 11 across build configurations and Maven archetypes. It also modifies OpenTelemetry dependency management in the BeamModulePlugin. Feedback highlights that stable OpenTelemetry artifacts like the API and SDK should have explicit versions defined, as the alpha BOM currently referenced does not manage stable versions, which may lead to resolution inconsistencies.

[github-actions]

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R: @chamikaramj for label java.
R: @liferoad for label build.

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