Add gradient and autodiff checks for linear operators #2137

Job	Run time
Translate scripts to notebooks	55s
Get list of notebooks	3s
Run notebook (direct_reconstruction.ipynb)	1m 40s
Run notebook (iterative_sense_reconstruction.ipynb)	1m 31s
Run notebook (pulseq_2d_radial_golden_angle.ipynb)	1m 31s
Run notebook (qmri_sg_challenge_2024_t1.ipynb)	1m 0s
Run notebook (qmri_sg_challenge_2024_t2_star.ipynb)	1m 44s
Run notebook (regularized_iterative_sense_reconstruction.ipynb)	1m 21s
Run notebook (t1_mapping_with_grad_acq.ipynb)	1m 14s
Build and deploy documentation	1m 18s
deploy	0s
	12m 17s

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