Fix 'getting started' links in examples folder (pytorch#979)

Summary:
Pull Request resolved: pytorch#979

Some of them are referring to the old deprecated doc.
Some of them are referring to the md file by doing '../../'. Let's use the website link directly.

Reviewed By: shoumikhin, dbort

Differential Revision: D50309082

fbshipit-source-id: ecac525db2e14f21f6ab1c964ea5fce205b0b5f3

add diagrams and partition part for delegate (pytorch#768)

Summary:
Pull Request resolved: pytorch#768

feedback from https://www.internalfb.com/diff/D50000932?dst_version_fbid=296807683117005&transaction_fbid=1135407234100470

Reviewed By: iseeyuan

Differential Revision: D50111826

fbshipit-source-id: 1c372dd363fa378d0cadfea66254fe8bfed428c2

sdoc update (pytorch#422)

Summary:
Pull Request resolved: pytorch#422

update static doc for bundled program api update

Reviewed By: tarun292

Differential Revision: D49470936

fbshipit-source-id: db964e4ef4a43bff98cb845bacb40360bf232233

Fix missing runner in Linux selective build and custom ops jobs (pyto…

…rch#313)

Summary:
I mistakenly replace this in pytorch#277.  The runner is not set here, and causes syntax error, for example https://github.com/pytorch/executorch/actions/runs/6167285165.  The workflow still works because the default `linux.2xlarge` is used (same runner type)

### Testing

The annotation error is gone now https://github.com/pytorch/executorch/actions/runs/6175961826

Pull Request resolved: pytorch#313

Test Plan: https://github.com/pytorch/executorch/actions/runs/6175961826

Reviewed By: mergennachin

Differential Revision: D49236002

Pulled By: huydhn

fbshipit-source-id: bd5282f582d23427fd1d7622ed3b2ee2e6ad93cb

8/29/2023 stable release tag

Aug 15th 2023 stable release