fix(QgsMapBoxGlStyleConverter): also handle text-rotate from property field

[benoitdm-oslandia]

Fix issue when a text-rotate is defined according a field value as this example:

 {
            "id": "World",
            "type": "symbol",
            "source": "esri",
            "layout": {
                "text-size": 13.3333,
                "text-rotate": {
                    "property": "_label_angle1",
                    "default": 0,
                    "type": "identity"
                },
                "text-field": "{_name1}",
                "text-optional": true,
                "visibility": "none"
            },

},

[benoitdm-oslandia]

@3nids I am not sure about my solution with the expression. Does it look fine to you?

[github-actions]

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[3nids]

Looking good, but I must say I am quite surprised that we don't have any other property/identity occurence in the current code.

[benoitdm-oslandia]

Looking good, but I must say I am quite surprised that we don't have any other property/identity occurence in the current code.

Yes indeed! FYI the implied json is https://www.arcgis.com/sharing/rest/content/items/50cb5f2dfaaf4ccb88f37be2d8e5661e/resources/styles/root.json

[benoitdm-oslandia]

@3nids I made the fix, is it ok?

[3nids]

all good