Deregister prosodyctl interval callback when spawn.stdin disappears

[OPNA2608]

Description

Feel free to close & address in a different manner if you have a preferred solution. I'm not super deep into JS/TS stuff, just upstreaming our downstream workaround.

---

Add callbacks to deregister the interval callback when stdin closes or errors out.

De-escalates the issue to the following messages:

• Usually:

  [...]
  server # [   69.269893] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.893 debug: ProsodyCtl was called in yesMode, writing to standard input.
  server # [   69.281086] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.902 debug: ProsodyCtl was called in yesMode, writing to standard input.
  server # [   69.291426] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.914 debug: ProsodyCtl was called in yesMode, writing to standard input.
  server # [   69.297076] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.919 info: Going to launch prosody (/nix/store/9dksh571y1wy0lns6af2qiyy4s9cfx0c-prosody-0.12.4/bin/prosody)
  server # [   69.304664] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.927 info: Creating a new http bind proxy
  server # [   69.308845] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.931 info: Creating a new websocket proxy
  server # [   69.310803] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.934 info: Creating a new s2s websocket proxy
  server # [   69.313199] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.935 info: Waiting for the prosody process to launch
  server # [   69.314654] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:10.936 debug: ProsodyCtl standard input closed, clearing interval.
  server # [   69.813078] peertube[1411]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:48:11.435 info: Verifying prosody is launched
  [...]

• Sometimes:

  [...]
  server # [   69.574057] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.158 debug: ProsodyCtl was called in yesMode, writing to standard input.
  server # [   69.583343] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.168 debug: ProsodyCtl was called in yesMode, writing to standard input.
  server # [   69.593365] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.178 debug: ProsodyCtl was called in yesMode, writing to standard input.
  server # [   69.600077] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.184 debug: ProsodyCtl standard input errored, clearing interval.
  server # [   69.601829] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.184 info: Going to launch prosody (/nix/store/9dksh571y1wy0lns6af2qiyy4s9cfx0c-prosody-0.12.4/bin/prosody)
  server # [   69.612112] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.196 info: Creating a new http bind proxy
  server # [   69.615585] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.200 info: Creating a new websocket proxy
  server # [   69.617591] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.202 info: Creating a new s2s websocket proxy
  server # [   69.620089] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.204 info: Waiting for the prosody process to launch
  server # [   69.621706] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.204 debug: ProsodyCtl standard input closed, clearing interval.
  server # [   70.122132] peertube[1413]: [localhost:9000 peertube-plugin-livechat] 2024-06-11 20:50:52.705 info: Verifying prosody is launched
  [...]

Related issues

Closes #416

Mandatory Checks

• [x] I have added a description of the changes in the CHANGELOG files
• [x] I have run npm run lint to check that my changes respects the coding conventions
• [ ] I have added user documentation for the new features I added
• [ ] I have added technical documentation for the new features I added
• [ ] I added some documentation and I have run npm run doc:translate to generate translations files

[JohnXLivingston]

Seems good to me. Thanks a lot!