Add server tutorials to the main tutorials branch

[luisaFelixSalles]

Add a new server tutorial into the "dpf server" section:

• It adapts the "switch between local and remote server (server types)" how-to

Preview on how it renders:

• DPF server section main page

• "Switch between local and remote server" tutorial

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.10%. Comparing base (df79026) to head (9b9e26e).

Additional details and impacted files

@@                      Coverage Diff                      @@
##           doc/new-tutorials-section    #1891      +/-   ##
=============================================================
- Coverage                      88.16%   88.10%   -0.07%     
=============================================================
  Files                             83       83              
  Lines                           9961     9951      -10     
=============================================================
- Hits                            8782     8767      -15     
- Misses                          1179     1184       +5     

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[PProfizi]

These need to be calls to print, otherwise we just get the repr of the Server object, which looks like this:

Suggested change

	local_server
	print(local_server)

[PProfizi]

Suggested change

	grpc_server
	print(grpc_server)

[PProfizi]

This tutorial should also describe the as_global parameter and the notion of global server.