Bedrock fine tune

[suyinw]

Issue #, if available:

Description of changes: Create the contents for fine-tuning FMs in Bedrock with setup, fine-tune+evaluation, cleaning up the resources.

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[markproy]

should add a markdown comment giving indication of how long the customization job should take

also same thing for Create PT which takes many minutes

[suyinw]

Thanks so much for the review @markproy and below are the edits to address the comments:

• Added dependency installation of tokenizers==0.12.1 to fix the installation issue of fmeval in 00_setup.ipynb; added setup tips with the full list of dependencies for reference
• Added installation of datasets in 00_setup.ipynb
• Removed the installation of fmeval package in 02 notebook as it's done in 00
• Removed the comment to select the modelId from the list, instead provided the reference model link from bedrock developer guide in 02 notebook
• The markdown for the estimated time of customization job and the PT job are already there (so left with no updates).

Additionally edits:

• Added the code block in 02 nb to visualize the training/validation loss for fine-tuning.