remove use of finite() function call superceded by isfinite in C99

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Issue #2563 new
Roland Haas created an issue

Apple removed the finite() function on their M1 version of macOS causing compiler failures. Affected thorns are:

  • IllinoisGRMHD
  • AHFinderDirect
  • GRHydro
  • GRHydro_InitData
  • TGRTensor