Storage streaming and RGBAlpha browse support and antimeridian fix

[lubojr]

• adds support for /vsis3_streaming, /vsiswift_streaming /vsicurl_streaming storage options and corresponding DB migration
• register browse with parent product bounds if unprojected
• removes 0,0,0 OFFSITE mapserver rendering command in case the registered Browse is of type RGBA (4 bands)
• add browse with empty name in layermapper when generating list of browses
  • specially for case when no coverage was registered but a default browse_type under name '' exists and product has a registered browse with it
• fixes antimeridian vrt rendering workaround