Concrete operators in normalized spaces

[jishnub]

In cases where the canonicalspace supports a concrete operator, the corresponding operator in the normalized space may also be concrete, which will avoid type-inference issues with TimesOperator and be much faster overall. E.g., after this,

julia> Derivative(NormalizedChebyshev(), 2)
ConcreteDerivative : NormalizedChebyshev() → Ultraspherical(2)
  ⋅    ⋅   3.19154   ⋅        ⋅        ⋅        ⋅         ⋅        ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅       4.78731   ⋅        ⋅        ⋅         ⋅        ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅       6.38308   ⋅        ⋅         ⋅        ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅       7.97885   ⋅         ⋅        ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅       9.57461    ⋅        ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅        ⋅       11.1704    ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅        ⋅         ⋅      12.7662    ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅        ⋅         ⋅        ⋅      14.3619  ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅        ⋅         ⋅        ⋅        ⋅      ⋱
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅        ⋅         ⋅        ⋅        ⋅      ⋅
  ⋅    ⋅    ⋅        ⋅        ⋅        ⋅        ⋅         ⋅        ⋅        ⋅      ⋅

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (422ec82) 69.41% compared to head (2c50c14) 73.08%.
Report is 4 commits behind head on master.

Files	Patch %	Lines
src/Spaces/Chebyshev/ChebyshevOperators.jl	90.47%	2 Missing ⚠️
...c/Spaces/Ultraspherical/UltrasphericalOperators.jl	85.71%	1 Missing ⚠️
src/fastops.jl	92.85%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #330      +/-   ##
==========================================
+ Coverage   69.41%   73.08%   +3.66%     
==========================================
  Files          30       30              
  Lines        2805     2827      +22     
==========================================
+ Hits         1947     2066     +119     
+ Misses        858      761      -97     

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