Add option for disable agent config plugins

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#### Description

Some plugins are enabled by default and are installed during provisioning.
In most cases, you don't need to enable the plugin when you create an image, so set the option to disable the plugin for the cloud agent.

agent config option
https://docs.oracle.com/en-us/iaas/tools/go/65.6.0/core/index.html#LaunchInstanceDetails

Start by searching existing issues for related feature requests, then review the Oracle LaunchInstanceDetails agent config option linked in the description. Done means the cloud agent can receive an option that prevents selected default plugins from being enabled during image provisioning.

Written by the indexing model from the issue text.