[Feature] - improve the behavior when agent commands fail (or are not available) due to missing configuration

[heiko-holz]

Is your feature request related to a problem? Please describe. When the agent commands (https://inspectit.github.io/inspectit-ocelot/docs/configuration/agent-command-configuration) are not enabled, logs/config/support archive cannot be retrieved from the configuration server. Other features, such as the log preloading, also need other settings to be enabled (e.g., inspectit.log-preloading.enabled).

Currently, we only receive a timeout exception and a generic error message when a respective agent command fails.

Describe the solution you'd like A uniform behavior for features using the agent commands when they fail due to disabled agent commands (or further configs, such as the log preloading).

I can think of either:

• an appropriate error message when the agent commands are disabled (or more settings are configured in a way that we expect a specific agent command to fail) in the DownloadDialogue that is triggered when one of the download agent commands is started
• disabling the buttons in the UI (i.e., logs, config, support archive) with a tooltip explaining what needs to be changed in the configuration to enable this feature