Simplify SDK tutorial by moving cmake commands to a script

[Olivia-liu]

Address this comment. Tested the commands on mac locally and they worked. The script just generates etdump when working properly. I did "ls -l etdump.etdp" to check the timestamp.

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3438

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:white_check_mark: No Failures

As of commit dfc11cf038d1112639099342f93e48af86408600 with merge base 41eec7af63243e6afd6658bb40cf9289e7cae0a3 (): :green_heart: Looks good so far! There are no failures yet. :green_heart:

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[facebook-github-bot]

@Olivia-liu has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@Olivia-liu has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@Olivia-liu merged this pull request in pytorch/executorch@a4ffd96a5093fb14c91a47d23703beb98d0fbfb9.

[Olivia-liu]

@pytorchbot cherry-pick --onto release/0.2 -c docs

[pytorchbot]

Cherry picking #3438

The cherry pick PR is at https://github.com/pytorch/executorch/pull/3492

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