fix(deps): update opentelemetry.instrumentation.alpha to v2.15.0-alpha

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.opentelemetry.instrumentation:opentelemetry-okhttp-3.0	2.14.0-alpha -> 2.15.0-alpha
io.opentelemetry.instrumentation:opentelemetry-instrumentation-api-incubator	2.14.0-alpha -> 2.15.0-alpha
io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha	2.14.0-alpha -> 2.15.0-alpha

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