Change default SVD algorithm to SDD and update tests

[pbrehmer]

This PR will change the default SVD algorithm to TensorKit.SDD since this generally outperforms TensorKit.SVD and is used as the default algorithm in TensorKit (and Base uses gesdd). Since this anyways modifies many tests, I will update the tests such that they all use the updated Defaults to the fullest possible extent.

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/utility/svd.jl	50.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
src/PEPSKit.jl	100.00% <ø> (ø)
src/algorithms/ctmrg/ctmrg.jl	91.39% <100.00%> (ø)
src/algorithms/ctmrg/gaugefix.jl	94.73% <100.00%> (ø)
src/utility/svd.jl	88.52% <50.00%> (ø)

... and 1 file with indirect coverage changes

[lkdvos]

I really like that we are using more Defaults in the tests and reduce the kwargs, looks great for me!