Update existing and remove deprecated pages from evaluation

[flicj191]

Update Evaluation section:

• ESMValTool:

  • Reflect ACCESS-NRI consortium membership
  • Promote usage via analysis3
  • Deprecate esmvaltool-workflow
  • Document ESMValCore API usage in notebooks

• ILAMB:

  • Update usage via analysis3
  • Remove access-med references

• Update Model Live Diagnostics (unsure about support level message?)

• Remove METPlus

• Move COSIMA Cookbook to “Additional / Community Resources”- (after COSIMA cookbook wording updates #1158 is merged)