Disable wandb by default + complete integration tests

[s-maddrellmander]

Changelogs

• Making sure the default behaviour is sensible, i.e. users aren't having to bodge a lack of wandb accounts + login details / project access etc.
• Adding tests for the new mode - ipu and cpu, complete integration tests for training + fine tuning

---

[codecov]

Codecov Report

Merging #434 (737fe92) into main (71182f4) will increase coverage by 0.66%.
Report is 7 commits behind head on main.
The diff coverage is 20.00%.

@@            Coverage Diff             @@
##             main     #434      +/-   ##
==========================================
+ Coverage   64.74%   65.41%   +0.66%     
==========================================
  Files          89       89              
  Lines        8215     8218       +3     
==========================================
+ Hits         5319     5376      +57     
+ Misses       2896     2842      -54     

Flag	Coverage Δ
unittests	65.41% <20.00%> (+0.66%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
ipu	49.14% <ø> (ø)

[DomInvivo]

Looks good! Minor changes only

[DomInvivo]

This will allow to pass more than just the entity or the project.

Suggested change

	elif wandb_cfg is not None:
	wandb.init(
	entity=wandb_cfg["entity"],
	project=wandb_cfg["project"],
	elif wandb_cfg is not None:
	wandb.init(
	config=cfg,
	**wandb_cfg

[DomInvivo]

Also override

trainer.trainer.check_val_every_n_epoch = 1
trainer.trainer.precision = 32, # perhaps you can make this 32 for CPU and 16 for IPU