Fix google supremacy circuit

[GiggleLiu]

• fix google53 circuit nbits.
• support put unitary channel on density matrix.
• add unitary_channel to make the interface consistent.
• add Hermitian in density matrix fidelity to avoid calling into incorrect subroutine.
• rename the weights field of unitary channel to probs

[codecov[bot]]

Codecov Report

Merging #396 (35f14d1) into master (f69a26d) will decrease coverage by 1.30%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #396      +/-   ##
==========================================
- Coverage   88.91%   87.61%   -1.31%     
==========================================
  Files          73       26      -47     
  Lines        4448     1558    -2890     
==========================================
- Hits         3955     1365    -2590     
+ Misses        493      193     -300     

Impacted Files	Coverage Δ
lib/YaoArrayRegister/src/utils.jl	86.15% <100.00%> (ø)
src/EasyBuild/google53.jl	74.60% <100.00%> (ø)
lib/YaoBlocks/src/blocktools.jl
lib/YaoBlocks/src/composite/unitary_channel.jl
lib/YaoBlocks/src/layout.jl
lib/YaoBlocks/src/composite/tag/cache.jl
lib/YaoBlocks/src/primitive/identity_gate.jl
lib/YaoBlocks/src/treeutils/treeutils.jl
...Blocks/src/autodiff/outerproduct_and_projection.jl
lib/YaoBlocks/src/autodiff/adjroutines.jl
... and 39 more

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