Switch packages over to using `random_mps`, `random_itensor`, etc.

[mtfishman]

Switch packages over to using random_mps and random_mpo introduced in ITensors.jl v0.6.7 and ITensorMPS.jl v0.2.2, along with random_itensor and diag_itensor introduced in ITensors.jl v0.6.8.

• [ ] ITensorAFQMC.jl - private and unregistered
  • [x] ITensorAGP.jl - unregistered
  • [x] ITensorChemistry.jl - unregistered
  • [x] ITensorCorrelators.jl - unregistered
  • [x] ITensorGaussianMPS.jl
  • [x] ITensorGLMakie.jl
  • [x] ITensorGPU.jl
  • [x] ITensorInfiniteMPS.jl
  • [x] ITensorMakie.jl
  • [ ] ITensorMPOCompression.jl
  • [x] ITensorMPOConstruction.jl - unregistered
  • [x] ITensorNetworks.jl
  • [x] ITensorParallel.jl - unregistered
  • [x] ITensorQTT.jl - unregistered
  • [x] ITensorTDVP.jl
  • [x] ITensorUnicodePlots.jl
  • [x] ITensorVisualizationBase.jl
  • [ ] PastaQ.jl

[mtfishman]

Completed as much as possible right now.