fix: silence devcontainer Permission denied error. Fixes #13109

[Adrien-D]

Fixes #13109

Motivation

chown command fails for some reason on .git folder on my mac M1

Modifications

I silenced the error by adding || true on the failing command on .devcontainer/pre-build.sh

-> The error is probably due to a mac-specific thing. It'll be to do with how the OS has mounted that volume to the dev docker container
-> There is no gitignore-style file for devcontainers, to ignore .git directory

Verification

The impact of the change are quite small, but the process reached the end

[agilgur5]

I'm wondering if this might accidentally break anything, but @Joibel, I, and others have run into this before.

Approving as this does solve the error in the interim (root cause fix would be preferred) but will give final say to Alan

[Joibel]

I added the chmod in the first place, so this is an incremental improvement upon the breakage that adding it has caused.

More people will successfully run devcontainers now hopefully.

[agilgur5]

Ah in #11153 part c). I rarely rebuild my devcontainer but IIRC I did have bugs with and without the chown.
It would be more optimal if we could just mount the directory as the user; IIRC the chown -R takes some time to get through every single file. Otherwise, a more selective chown might be possible (skipping .git, for instance)