fix: respect clickable prop in AdvancedMarker

[shimizu-futa]

Description

This PR fixes an issue where the AdvancedMarker remains clickable even when the clickable prop is explicitly set to false.

As discussed in #904 , the current logic for gmpClickable incorrectly evaluates to true if clickable is defined as false. I have updated the logic to properly respect the boolean value of the prop.

Related Issue

Closes #904

Changes

• Updated the gmpClickable calculation in advanced-marker.tsx to ensure it only evaluates to true when clickable is actually true (or when interaction callbacks are present).

How to Test

1. Render an AdvancedMarker with clickable={false}.
2. Verify that the gmp-clickable attribute is not applied (or set to false) in the DOM.
3. Confirm that the marker no longer intercepts click events, allowing them to propagate to the map.

[usefulthink]

Awesome, thanks a lot.