[Feat]: Add a max-height css property for sp-action-menu / sp-menu

### Code of conduct

- [X] I agree to follow this project's code of conduct.

### Impacted component(s)

sp-popover

### Description of the requested feature

When using the `sp-action-menu`, there is no accessible way via css property to limit the height of the `sp-menu`.
We would like to add a `max-height` option in cases where we know a user could potentially have hundreds of options to select from. In this scenario, the menu fills the entire height of the available screen which can block/temporarily hide other important, informative and interactive UI.

### Mockups or screenshots


### Implementation notes or ideas

We have already investigated the `sp-combobox` component and it is not an applicable solution for us at this time. The design implementation is an icon that a user clicks on to open the menu. Then the menu opens with an option to either create a library or save to an existing library. Users could have many libraries which are dynamically fetched and rendered when a user scrolls to the end of the menu.

Start by tracing how sp-action-menu and sp-menu use sp-popover, focusing on where menu sizing is defined. Confirm the intended max-height behavior for dynamically rendered options, then add coverage for a constrained menu and verify that the menu remains usable when many options are present.

Written by the indexing model from the issue text.