Add namd with tcl support

Daniel Filipe Janarequested to merge
packages/namd-tcl into main

tcl is needed for certain types of standard namd inputs, spack chose a non-tcl version last time around

needed to explicitly set namd@3.0.1 interface=tcl in definitions_acc_cuda.yaml to trigger a reconcretization, the requirement in packages*.yaml was not enough

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