Fix references to Elasticsearch in plugin for Wazuh stack

[Desvelao]

Wazuh	Elastic	Rev	Security
4.x	7.x	4xxx	Basic, ODFE, Xpack

Browser
Chrome, Firefox, Safari, etc

Description There are some references to Elasticsearch that should be renamed to Wazuh indexer in the plugin for Wazuh dashboard.

Found references:

• https://github.com/wazuh/wazuh-kibana-app/blob/v4.3.6-1.2.0-wzd/server/controllers/wazuh-elastic.ts#L128
• https://github.com/wazuh/wazuh-kibana-app/blob/v4.3.6-1.2.0-wzd/server/controllers/wazuh-elastic.ts#L171

Both messages could be displayed in the UI depending on how the error to these endpoints is managed.

Todo:

• Search if there are more references that should be renamed.

Possible solutions

• Replace the references centralizing the name.
• Remove the brand reference