Refine Malware detection dashboard

[asteriscos]

Wazuh	Rev	Browser
4.8.0	05	-

Description

The Malware detection dashboards needs a few changes to support alert that don't have the rule.mitre field and a change in the Emotet visualization label.
The rule.mitre fields have to be removed because some alerts don't have them and they are not displayed in the table.

Parent issue:

• [Update dashboards] Create malware detection dashboard #5898

Tasks

• Change the top left visualization label from Emotet malware activity to Malware activity
• Remove the fields rule.mitre.tactic and rule.mitre.id in the lower table.