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
• ITensorAGP.jl - unregistered
• ITensorChemistry.jl - unregistered
• ITensorCorrelators.jl - unregistered
• ITensorGaussianMPS.jl
• ITensorGLMakie.jl
• ITensorGPU.jl
• ITensorInfiniteMPS.jl
• ITensorMakie.jl
• ITensorMPOCompression.jl
• ITensorMPOConstruction.jl - unregistered
• ITensorNetworks.jl
• ITensorParallel.jl - unregistered
• ITensorQTT.jl - unregistered
• ITensorTDVP.jl
• ITensorUnicodePlots.jl
• ITensorVisualizationBase.jl
• PastaQ.jl