Refactor/web optimized arg

[alexismanin]

Changes discussed in #277

Deprecate parameter "web_optimized" of cogeo.cog_translate Python function.

Notes: I would like guidelines about:

• Deprecation syntax in apidoc: I am not very familiar with Python docstring, so I have tried to apply Sphinx deprecated directive. But I am not sure if it was the right move.
• I also tried to update the cli:
  • I have not deprecated web-optimized option there, because user cannot pass a tms id (like "WebMercatorQuad"), so I suppose web-optimized will remain prominent there.
  • However, I tried to rework internals to depend less on it. But by doing so, I stumbled upon a conflict: it looks like overview-blocksize is silently ignored in case tms or web-optimized is specified. I have let it as is, but maybe there is something to change here (echo a warning to the user ? change some logic ?)

[alexismanin]

@alexismanin I have reworked my changes to include your suggestions. I also rebased my branch over up-to date main branch.