Build issue with Intel LLVM-based fortran compiler (ifx) with OpenFAST 3.5.2 and 3.5.3

[abhineet-gupta]

OpenFAST 3.5.2 and 3.5.3 do not compile if the LLVM-based compiler Intel Fortran Compiler (ifx) is used.
However, if the older Intel Fortran Compiler Classic (ifort) is used then the code compiles just fine.

Wtih some testing, I found that the issue was introduced in 96eb6b6 in the cleanup code in AeroDyn_Inflow.f90.
As ifort is deprecated and will stop working soon, this needs a fix.