pygmt.project: Fix the bug that passing x/y/z is not allowed

[seisman]

project accepts both data or x/y/z inputs, but currently passing x/y/z raises an exception.

Here is the minimal example to reproduce the bug:

In [1]: import pygmt

In [2]: pygmt.project(
   ...:     data=[[0, 0], [1, 1]],
   ...:     center=[0, -1], azimuth=45, flat_earth=True,
   ...: )
Out[2]:
     0    1         2         3    4             5
0  0.0  1.0  1.414214  1.414214  1.0 -1.773023e-16
1  0.0  1.0  1.414214  1.414214  1.0 -1.773023e-16

In [3]: pygmt.project(x=[0, 1], y=[0, 1], center=[0, -1], azimuth=45, flat_earth=True)
---------------------------------------------------------------------------
GMTParameterError                         Traceback (most recent call last)
Cell In[3], line 1
----> 1 pygmt.project(x=[0, 1], y=[0, 1], center=[0, -1], azimuth=45, flat_earth=True)

File ~/OSS/gmt/pygmt/pygmt/helpers/decorators.py:599, in use_alias.<locals>.alias_decorator.<locals>.new_module(*args, **kwargs)
    592 if "Y" in kwargs or "yshift" in kwargs:
    593     raise GMTParameterError(
    594         reason=(
    595             "Parameters 'Y' and 'yshift' are no longer supported since 0.12.0. "
    596             "Use Figure.shift_origin(yshift=...) instead."
    597         )
    598     )
--> 599 return module_func(*args, **kwargs)

File ~/OSS/gmt/pygmt/pygmt/src/project.py:227, in project(data, x, y, z, output_type, outfile, azimuth, center, endpoint, width, length, pole, verbose, coltypes, **kwargs)
    225     raise GMTParameterError(required="center")
    226 if kwargs.get("G") is None and data is None:
--> 227     raise GMTParameterError(
    228         required="data", reason="Required unless 'generate' is set."
    229     )
    230 if kwargs.get("G") is not None and kwargs.get("F") is not None:
    231     raise GMTParameterError(at_most_one=["convention", "generate"])

GMTParameterError: Missing required parameter: 'data'. Required unless 'generate' is set.

This PR fixes the issue and adds a test.

[seisman]

data or x/y/z is required if -G option (generate mode) is not set.