[ENH, BUG] : added time_tournament_is_strongly_connected benchmark, renamed tournament_is_strongly_connected to is_strongly_connected

[Schefflera-Arboricola]

Please do "Squash and merge" while merging this PR

1. added time_tournament_is_strongly_connected benchmark
2. renamed tournament_is_strongly_connected to is_strongly_connected in tournament.py and then assigned tournament_is_strongly_connected = is_strongly_connected in Dispatcher class, like how it's done in the main networkx repo(origin ENH : Adding backend_info entry point #27)

>>> import nx_parallel as nxp
>>> import networkx as nx
>>> G = nx.tournament.random_tournament(50, seed=42)
>>> nx.tournament.is_strongly_connected(G)
True

Before :

>>> nxp.tournament.is_strongly_connected(G)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'nx_parallel.algorithms.tournament' has no attribute 'is_strongly_connected'

After :

>>> nxp.tournament.is_strongly_connected(G)
True

[Schefflera-Arboricola]

The failed test should pass after a re-run.
fixed @ networkx/networkx#7264