docs(aws/tutorials): migrate /aws/tutorials section to use lstk

[peter-smith-phd]

Overview

Migrates the /aws/tutorials section to the lstk CLI, continuing the section-by-section migration in #862 / #800 / #815 / #789 / #792. Each of the 17 tutorials is converted from localstack / awslocal / tflocal / cdklocal to the equivalent lstk, lstk aws, and lstk terraform commands, with prerequisites and installation links repointed accordingly.

In some tutorials, a small number of sentences were removed because they illustrated minor features that aren't supported by lstk. This doesn't materially impact the overall tutorial.

In general, this PR does not attempt to fix broken/stale tutorials, but instead focused on migrating to lstk. There were however a few minor changes made, based on asking Claude to "run the tutorial" and report if it works or not.

• iam-policy-stream — the tutorial claimed that with IAM_SOFT_MODE=1 the SendMessage call is denied and the queue stays empty. However, Soft mode logs the violation but does not block the call, so the message is delivered.

• reproducible-machine-learning-cloud-pods — corrected the merge strategy names (account-region-merge is the default; overwrite and service-merge are the others — the previously documented "basic merge" and "deep merge" do not exist).

• schema-evolution-glue-msk — deleted the "Testing the application" section. It was built on commands that do not exist (awslocal kafka-produce, awslocal kafka-consume, awslocal glue register-schema-version), and the example data did not match the rest of the tutorial.

As a follow-up exercise, it's recommended that we perform each of these tutorials end-to-end, to find other things that have drifted over time.

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