Bump otelInstrumentationAlphaVersion from 2.14.0-alpha to 2.15.0-alpha

Bumps `otelInstrumentationAlphaVersion` from 2.14.0-alpha to 2.15.0-alpha.

Updates `io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha` from 2.14.0-alpha to 2.15.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

Updates `io.opentelemetry.instrumentation:opentelemetry-instrumentation-api-incubator` from 2.14.0-alpha to 2.15.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

Updates `io.opentelemetry.javaagent:opentelemetry-javaagent-extension-api` from 2.14.0-alpha to 2.15.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

Updates `io.opentelemetry.javaagent:opentelemetry-javaagent-bootstrap` from 2.14.0-alpha to 2.15.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

Updates `io.opentelemetry.javaagent:opentelemetry-javaagent-tooling` from 2.14.0-alpha to 2.15.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

---
updated-dependencies:
- dependency-name: io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
  dependency-version: 2.15.0-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.opentelemetry.instrumentation:opentelemetry-instrumentation-api-incubator
  dependency-version: 2.15.0-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.opentelemetry.javaagent:opentelemetry-javaagent-extension-api
  dependency-version: 2.15.0-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.opentelemetry.javaagent:opentelemetry-javaagent-bootstrap
  dependency-version: 2.15.0-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.opentelemetry.javaagent:opentelemetry-javaagent-tooling
  dependency-version: 2.15.0-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

dependencyManagement/build.gradle.kts

@@ -12,7 +12,7 @@ val dependencyVersions = hashMapOf<String, String>()
 rootProject.extra["versions"] = dependencyVersions
 
 val otelSdkVersion = "1.48.0"
-val otelInstrumentationAlphaVersion = "2.14.0-alpha"
+val otelInstrumentationAlphaVersion = "2.15.0-alpha"
 val otelInstrumentationVersion = "2.14.0"
 val otelContribVersion = "1.43.0"