add geoRenderType optional paramter to geoscatter geoplot and geobubble functionalities

[gilbertogalvis]

This PR add a new optional parameter to fig2plotly which works for geoscatter, geoplot and geobubble functionalities. This optional parameter is called 'geoRenderType' and it allows us to set the type of rendering that we want for the geographic charts. Among the rendering types we have: 1) 'geo' (by default) which is based on D3.js and 2) 'mabox' which is tile-based. 'mapbox' is much more powerful in terms of visualization, but it has certain limitations regarding the configuration of markers and texts. The user can now choose the type of rendering they want.

This PR has been tested for all examples at https://github.com/plotly/ssim_baselines/tree/main/matlab/code-examples/geographic-plots.

I share below two examples (one for each type of rendering) using the geoplot functionality. However, both examples can be extended to the other two geographic chart functionalities (geoscatter and geobubble). Feel free to recreate these examples.

geo rendering:

latSeattle = 47.62;
lonSeattle = -122.33;
latAnchorage = 61.20;
lonAnchorage = -149.9;
geoplot([latSeattle latAnchorage],[lonSeattle lonAnchorage])
geolimits([45 62],[-149 -123]);
geobasemap colorterrain;

fig2plotly(gcf, 'offline', true, 'geoRenderType', 'geo');

mapbox rendering:

latSeattle = 47.62;
lonSeattle = -122.33;
latAnchorage = 61.20;
lonAnchorage = -149.9;
geoplot([latSeattle latAnchorage],[lonSeattle lonAnchorage])
geolimits([45 62],[-149 -123]);
geobasemap colorterrain;

fig2plotly(gcf, 'offline', true, 'geoRenderType', 'mapbox');

Attach bellow results all geographic charts as well as links to chart-studio for each redering type

geoscatter:

https://chart-studio.plotly.com/~galvisgilberto/4548/#/
https://chart-studio.plotly.com/~galvisgilberto/4550/#/
https://chart-studio.plotly.com/~galvisgilberto/4552/#/
https://chart-studio.plotly.com/~galvisgilberto/4554/#/

geoplot:

https://chart-studio.plotly.com/~galvisgilberto/4556/#/
https://chart-studio.plotly.com/~galvisgilberto/4558/#/
https://chart-studio.plotly.com/~galvisgilberto/4560/#/
https://chart-studio.plotly.com/~galvisgilberto/4564/#/
https://chart-studio.plotly.com/~galvisgilberto/4566/#/
https://chart-studio.plotly.com/~galvisgilberto/4568/#/

geobubble:

https://chart-studio.plotly.com/~galvisgilberto/4570/earthquake-earthquake-and-landslide-landslide-meteorological-unknown-cause-volca/#/
https://chart-studio.plotly.com/~galvisgilberto/4572/earthquake-earthquake-and-landslide-landslide-meteorological-unknown-cause-volca/#/