Refactor %%cython to use IPython magic_arguments module

[user202729]

Refactor to use https://ipython.readthedocs.io/en/stable/api/generated/IPython.core.magic_arguments.html

Feature was originally added in #38945 before I realize the IPython helper module exists.

There's slight change in error message for unbalanced quotes, but I think it doesn't matter. (Edit: for simple cases it doesn't matter. See discussion in ipython/ipython#2001 )

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[user202729]

The documentation rendering doesn't seem to work too well?

Obviously because of the added text in the docstring by the decorators.

sage: from sage.repl.ipython_extension import SageMagics
sage: print(SageMagics.cython.__doc__)
::

  %cython [--verbose VERBOSE] [--compile-message | --no-compile-message]
              [--use-cache | --no-use-cache] [--create-local-c-file | --no-create-local-c-file]
              [--annotate | --no-annotate] [--view-annotate [{none,auto,webbrowser,displayhtml}]]
              [--sage-namespace | --no-sage-namespace]
              [--create-local-so-file | --no-create-local-so-file]

Cython cell magic.

This is syntactic sugar on the
:func:`~sage.misc.cython.cython_compile` function.

[...]

Test invalid quotes::

    sage: # needs sage.misc.cython
    sage: shell.run_cell('''
    ....: %%cython --a='
    ....: print(1)
    ....: ''')
    UsageError: argument --annotate/--no-annotate: ignored explicit argument "'"

options:
  --verbose VERBOSE, -v VERBOSE
  --compile-message, --no-compile-message
  --use-cache, --no-use-cache
  --create-local-c-file, --no-create-local-c-file
  --annotate, --no-annotate
  --view-annotate <[{none,auto,webbrowser,displayhtml}]>
  --sage-namespace, --no-sage-namespace
  --create-local-so-file, --no-create-local-so-file

sage: 

Besides, why is the initial line % instead of %%? (ipython/ipython#14715)

[kwankyu]

Then I see no real benefit of using the IPython helper module for sage users...