V24.3.0 folder 2 updates

[hrobarts]

01_optimisation_gd_fista

• Change objective function to f in GD to hide deprecation warning
• Suppress deprecation warnings to hide rtol and atol deprecation warning GD raises deprecation warning if atol and rtol are not used CIL#2054
• Update to use nonnegativity in FISTA and PDHG should close 01_optimisation non-negativity #235 (comment) and 01_optimisation_gd_fista convergence plot doesn't show dual objective #233
  PDHG now running for 500 iterations, then plot PDHG primal, dual and gap
  
  Then run 500 more iterations and compare the convergence with FISTA
  

02_tikhonov_block_framework.ipynb

• show1D labels -> dataset_labels

03_PDHG

• show1D labels -> dataset_labels
• Add check_convergence = False, in code and snippet

04_SPDHG

• Set nonnegativity=True in FGP_TV
• No solution for SPDHG error for now caused by Bug using out with scaled Astra and Tigre projection operators. CIL#2058

05_laminography_with_TV looks good!

closes #225

[MargaretDuff]

The 01 notebook looks good to me, I just left a few comments on the wording.

[hrobarts]

Thanks @MargaretDuff for looking at notebook 01. The other notebooks only have small changes so we're happy to merge.