Feature querying should return existing annotations

[1ec5]

When the feature querying API detects a feature in an annotation layer, it should somehow return the MGLAnnotation object that the feature represents – that is, the same MGLAnnotation object that was added to the map to place the feature on the map.

/cc @boundsj

[1ec5]

In particular, the returned feature must not be tiled. Otherwise, the developer will immediately run into a roadblock: #6538.

[friedbunny]

This also includes annotations that happened to conform to MGLFeature — the additional identifier and attributes properties will not be persisted if such an object is added as an annotation.

To make full use of MGLFeature-conforming annotations, instead add them to the map using the runtime styling API.

[1ec5]

This also includes annotations that happened to conform to MGLFeature — the additional identifier and attributes properties will not be persisted if such an object is added as an annotation.

This will become apparent to the developer at compile time once we fix #7454.

[stale]

This issue has been automatically detected as stale because it has not had recent activity and will be archived. Thank you for your contributions.

[1ec5]

Still needed as a prerequisite for #6181.

[stale]

This issue has been automatically detected as stale because it has not had recent activity and will be archived. Thank you for your contributions.

[stale]

This issue has been automatically detected as stale because it has not had recent activity and will be archived. Thank you for your contributions.