[Monitor Management] Update beta badge hover copy

[paulb-elastic]

When hovering over the Beta badge on Monitor Management, the copy should be changed to reflect the limitations of the beta programme, more like what we have with the Synthetics Integration, like this:

If there is a standard for beta copy, use that. Alternatively, use this:

This is not recommended for use in production environments.

[bmorelli25]

The standard beta copy that we have is:

This functionality is in beta and is subject to change. The design and code is less mature than official generally available features and is being provided as-is with no warranties. Beta features are not subject to the support service level agreement of official generally available features.