Plugin manager does not remove integration plugin overlaps when installing from offline packs

[edmocosta]

Logstash information:

Please include the following information:

1. Logstash version: 8.14.0
2. Logstash installation source: zip archive
3. How is Logstash being run: Via command line

JVM (e.g. java -version): bundled

Description of the problem including expected versus actual behavior:

The plugin manager is not removing integration plugin overlaps when installing it from an offline plugin packs.
The installation process works, but Logstash ends up with duplicate plugins names, loading them by chance and causing troubles.

Steps to reproduce:

Example of SNMP integration plugin, please note that logstash-input-snmp and logstash-input-snmptrap are embedded within this Logstash version:

# bin/logstash-plugin list --verbose | grep snmp

logstash-input-snmp (1.3.3)
logstash-input-snmptrap (3.1.0)

In another Logstash copy, install and generate an offline plugin pack (bin/logstash-plugin prepare-offline-pack logstash-integration-snmp)

In the offline Logstash:

bin/logstash-plugin install file:///logstash-offline-plugins-8.11.4.zip

Check the snmp installed plugins:

# bin/logstash-plugin list --verbose | grep snmp

logstash-input-snmp (1.3.3)
logstash-input-snmptrap (3.1.0)
logstash-integration-snmp (4.0.3)
 ├── logstash-input-snmp
 └── logstash-input-snmptrap