Fix incompatibilities with NumPy 2.0

[bcoconni]

Following the release of Numpy 2.0, the function numpy.mat has been deprecated. It is recommended by the Numpy 2.0 migration guide to replace numpy.mat by numpy.asmatrix. However:

• We want to support Numpy 1.xx and it is unclear in the documentation when the function np.asmatrix has been introduced. In particular, it might not be supported for older versions of Numpy.
• We have been using np.matrix for the last 6 years (see below) and NumPy 1.xx never complained.

jsbsim/tests/TestGndReactions.py

Lines 90 to 95 in e33e184

	Tb2l = np.matrix([[ math.cos(theta), 0.0, math.sin(theta)],
	[ 0.0, 1.0, 0.0],
	[-math.sin(theta), 0.0, math.cos(theta)]])
	Ts2b = np.matrix([[-1.0, 0.0, 0.0],
	[ 0.0, 1.0, 0.0],
	[ 0.0, 0.0, -1.0]])

jsbsim/tests/TestFunctions.py

Lines 272 to 280 in e33e184

	Ma = np.matrix([[ math.cos(a), 0.0, math.sin(a)],
	[ 0.0, 1.0, 0.0],
	[ -math.sin(a), 0.0, math.cos(a)]])
	Mb = np.matrix([[ math.cos(b), math.sin(b), 0.0],
	[ -math.sin(b), math.cos(b), 0.0],
	[ 0.0, 0.0, 1.0]])
	Mc = np.matrix([[ 1.0, 0.0, 0.0],
	[ 0.0, math.cos(c), -math.sin(c)],
	[ 0.0, math.sin(c), math.cos(c)]])

As our CI workflow installs NumPy 2.0 by default on the MacOSX ARM64 platform, the current PR replaces all occurrences of numpy.mat by numpy.matrix to support Numpy 1.xx and 2.0.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.94%. Comparing base (e33e184) to head (d00a703).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1107   +/-   ##
=======================================
  Coverage   24.94%   24.94%           
=======================================
  Files         170      170           
  Lines       18235    18235           
=======================================
  Hits         4548     4548           
  Misses      13687    13687           

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