[Bug] WMSLayer positions EPSG:4326 images as CARTESIAN #10806

Description

WMSLayer positions EPSG:4326 images as if they were Web Mercator.

renderLayers() picks the BitmapLayer image coordinate system from lastRequestParameters.srs:

_imageCoordinateSystem:
  lastRequestParameters.srs === 'EPSG:4326' ? COORDINATE_SYSTEM.LNGLAT : COORDINATE_SYSTEM.CARTESIAN,

The stored object is the GetImageParameters passed to getImage(), whose field has been crs since #8262 (crs: srs). lastRequestParameters.srs is always undefined, so the image is always CARTESIAN. This affects srs: 'EPSG:4326' and srs: 'auto' under GlobeView, which resolves to EPSG:4326.

Expected Behavior

An image requested in EPSG:4326 is rendered with _imageCoordinateSystem: COORDINATE_SYSTEM.LNGLAT.

Steps to Reproduce

Render new _WMSLayer({data: wmsUrl, layers: [...], srs: 'EPSG:4326'}) in a MapView: the GetMap request uses CRS=EPSG:4326, but the image is stretched as a Web Mercator rectangle. Reproduced on master with a unit test that records the request and inspects the sub layer.

Environment

• Framework version: deck.gl master (b04c8f2), also 9.4.0
• Browser: any
• OS: any