Normalize Elasticsearch REST common javaagent package

[trask]

Part of

• Tracking package and module name alignment #18428

[Copilot]

Pull request overview

Normalizes the Javaagent package name for the shared Elasticsearch REST “common” instrumenter factory to align package/module naming (per the package/module alignment effort referenced in #18428).

Changes:

• Moved ElasticsearchRestJavaagentInstrumenterFactory into the versioned ...elasticsearch.rest.common.v5_0 package.
• Updated Elasticsearch REST 5.0/6.4/7.0 javaagent singletons to import the factory from the new package.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
instrumentation/elasticsearch/elasticsearch-rest-common-5.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/elasticsearch/rest/common/v5_0/ElasticsearchRestJavaagentInstrumenterFactory.java	Updated package declaration to the normalized versioned common package.
instrumentation/elasticsearch/elasticsearch-rest-7.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/elasticsearch/rest/v7_0/ElasticsearchRest7Singletons.java	Updated import to the factory’s new package.
instrumentation/elasticsearch/elasticsearch-rest-6.4/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/elasticsearch/rest/v6_4/ElasticsearchRest6Singletons.java	Updated import to the factory’s new package.
instrumentation/elasticsearch/elasticsearch-rest-5.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/elasticsearch/rest/v5_0/ElasticsearchRest5Singletons.java	Updated import to the factory’s new package.