Pulseaudio direct connection

[josa41]

Set Ghaf audio apps to directly connect to audiovm with pulseaudio

Description of changes

Makes app vms use audiovm pulseaudio directly without application audio tunneling
With this change the pulseaudio don't move patch is not needed

Checklist for things done

• Summary of the proposed changes in the PR description
• More detailed description in the commit message(s)
• Commits are squashed into relevant entities - avoid a lot of minimal dev time commits in the PR
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• PR linked to architecture documentation and requirement(s) (ticket id)
• Test procedure described (or includes tests). Select one or more:
  • Tested on Lenovo X1 x86_64
  • Tested on Jetson Orin NX or AGX aarch64
  • Tested on Polarfire riscv64
• Author has run make-checks and it passes
• All automatic Github Action checks pass - see actions
• Author has added reviewers and removed PR draft status
• Change requires full re-installation
• Change can be updated with nixos-rebuild ... switch

Appvm audio routing has changed, audio should work same as before

Instructions for Testing

• List all targets that this applies to: Lenovo X1, Dell-Latitude
• Is this a new feature
  • List the test steps to verify:
• If it is an improvement how does it impact existing functionality? no changes

[humaidq-tii]

Maybe this should be an option, as some applications do not respect/read this environment variable and just connect to localhost.

[josa41]

Good comment, yes that was one of the original reasons for the previous implementation.
There were some complaints that with the earlier setup the TCP tunnel remains open after the application is closed.