Add ScaledChebyshevPolynomial bloq
#1231
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This bloq is a wrapper around$\mathcal{B}[A/\alpha]$ whose normalization factor $\alpha \neq 1$ . Following the reference, it constructs a linear combination of Chebyshev polynomials to recover a block encoding of $\mathcal{B}[T_j(A)]$ which is not a scaled version of $\mathcal{B}[T_j(A/\alpha)]$ in general.
ChebyshevPolynomialthat computes Chebyshev polynomials of block encodings