Fix ssl-cert-snakeoil.key permission denied

[liweijian]

Changelog:

Area of change
- Add some `chmod` and `chown` in the **scripts/devcontainer/_start-background-services**

alternatively:

No changelog

What is the problem/goal being addressed?

Not sure if it's always happen, but I got this postgresql related error when trying to run scripts/builder --compile --watch --test

UTC FATAL: could not access private key file "/etc/ssl/private/ssl-cert-snakeoil.key": Permission denied

What is the solution to this problem?

It sounds a lot like that's a really tricky issue, inspired by this crazy solution, finally I made it.

What are the changes here? How do they solve the problem and what other product impacts do they cause?

I just added some chmod and chown in the scripts/devcontainer/_start-background-services, I believe it won't have any other product impacts.

How are you sure this works/how was this tested?

I didn't test it, but after adding this shell commands, I got -- Initial compile succeeded finally.

What is the reversion plan if this fails after shipping?

Just rollback this script.

Has this information been included in the comments?

No, since it's an one-off script.

[CLAassistant]

All committers have signed the CLA.

[pbiggar]

Thanks! Have copied this into #4118