Updating workshop for new Agents for Bedrock functionalities

[mttanke]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[w601sxs]

some small changes:

• when trying to create dynamo db table, the except section prints "Table restaurant_bookings already exists, skipping table creation step" even if there is some other issue (like a permissions issue).
• potential case to be tested in create_lambda function - it tries to create a lambda, and exception is it retirieves a lambda. There could be a case where even the exception fails, right?
• insisting on higher standards here - I think we can check if the agent is created using some util function in agents.py - currently we do "time.sleep(30)" . same thing for making sure agent is prepared. same thing for "... to make sure kb is available".
• minor - was "TSTALIASID" supposed to be 'TESTALIASID'?
• change : "allows" to "to allow" here - Use Case We will update our restaurant assistant to allows cus....
• If we aren't already, we should use common utility functions across multiple folders.. for example, should the KB folder use your KnowledgeBase class ?
• do we need another "time.sleep(30)" before associating the agent and KB
• Can fix formatting here:

  
  Based on the provided menu information, the children's menu at The Regrettable Experience restaurant does not seem to have a dedicated "starters" section. However, some of the entree options could potentially serve as starters or appetizers for children, such as:

• Mini Cheese Quesadillas
• Veggie Pita Pockets
• Peanut Butter and Banana Sandwich5

• 03 notebook gets a strange error, may need to test again for store -r. Maybe be explicit about what you want to restore

  Unable to restore variable 'E1', ignoring (use %store -d to forget!)
  The error was: <class 'KeyError'>
  Unable to restore variable 'E2', ignoring (use %store -d to forget!)
  The error was: <class 'KeyError'>

• Just noticed that invokeAgent is used everywhere. Good to put it in agent.py I think
• Do a selectAllFromDynamodb() after the other language examples instead of at the end - nice to see it update after every query
• "Next we will discuss some Open Source examples" > this is a good place to point to the deep dive agents workshop from the notebook.

... also, why "regrettable experience" lol