executorch [executorch] Migrate extension/runner

Stack from ghstack (oldest at bottom):

-> #4621
#4620
#4619
#4618
#4617
#4616
#4615
#4614
#4613
#4612
#4611
#4610
#4609
#4608
#4607
#4606
#4605

Migrate these headers to the new ::executorch::extension namespace. Add temporary aliases from the old ::torch::executor namespace so we can migrate users incrementally.

Differential Revision: D60938933

Aug 09 '24 00:08 dbort

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/4621

:page_facing_up: Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

:x: 2 New Failures, 4 Cancelled Jobs

As of commit 7b1cd58e759a15eccb04885b1b773bada02bce08 with merge base 5c9a00a3e34aa008510989febc42f1de90351494 ():

NEW FAILURES - The following jobs have failed:

Android / run-emulator (gh) The process '/opt/android/sdk/platform-tools/adb' failed with exit code 224
Android / test-llama-app (bpe) / mobile-job (android) (gh) Process completed with exit code 1.

CANCELLED JOBS - The following jobs were cancelled. Please retry:

This comment was automatically generated by Dr. CI and updates every 15 minutes.