chore: remove useEffects

[gatici]

Description

This PR reduces the usage of useEffect in the NMS.
useEffect is removed from 4 different places and useQuery is used.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that validate the behaviour of the software.
• I validated that new and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

[patriciareinoso]

I get the following error when building the NMS (it was not there before) :

ReferenceError: location is not defined
    at s (.next/server/app/page.js:1:3006)
Error fetching Swagger specs: TypeError: Failed to parse URL from swagger/doc.json
    at <unknown> (.next/server/chunks/638.js:2:6875)
    at K (.next/server/chunks/638.js:2:13357)
    at <unknown> (.next/server/chunks/638.js:2:16319)
    at async (.next/server/app/(api)/api/page.js:1:3678) {
  [cause]: TypeError: Invalid URL
      at <unknown> (.next/server/chunks/638.js:2:6875)
      at K (.next/server/chunks/638.js:2:13357)
      at <unknown> (.next/server/chunks/638.js:2:16319)
      at async (.next/server/app/(api)/api/page.js:1:3678) {
    code: 'ERR_INVALID_URL',
    input: 'swagger/doc.json'
  }
}

The access to the swagger page seems fine onces it's running. I think it tries to access to the page during building when it does not exist yet because it comes from the webconsole, and the webconsole is not there yet?

[patriciareinoso]

If the UPF and gnbs are missing where creating a new NS, the error message is no longer shown:

[patriciareinoso]

If there a no NS or DG created the DG field in Create Subscriber Modal is missing the caption:

[patriciareinoso]

I am running into a issue when editing the subscribers:

1. Create a NS
2. Add a second DG to the that NS
3. Add a subscriber attached to the NS and a DG.
4. Edit the subscriber to change the DG.
   -> you need to refresh the page to show the Subscriber.
   This happens as well if I change the NS of the subscriber but its does not happen if I edit the text fields.

If I have 2 subscribers and I edit one of them to change the DG, only the one I edited disappears from the list.

[patriciareinoso]

If I delete a subscriber there are many error logs in the console

[gatici]

I get the following error when building the NMS (it was not there before) :

ReferenceError: location is not defined
    at s (.next/server/app/page.js:1:3006)
Error fetching Swagger specs: TypeError: Failed to parse URL from swagger/doc.json
    at <unknown> (.next/server/chunks/638.js:2:6875)
    at K (.next/server/chunks/638.js:2:13357)
    at <unknown> (.next/server/chunks/638.js:2:16319)
    at async (.next/server/app/(api)/api/page.js:1:3678) {
  [cause]: TypeError: Invalid URL
      at <unknown> (.next/server/chunks/638.js:2:6875)
      at K (.next/server/chunks/638.js:2:13357)
      at <unknown> (.next/server/chunks/638.js:2:16319)
      at async (.next/server/app/(api)/api/page.js:1:3678) {
    code: 'ERR_INVALID_URL',
    input: 'swagger/doc.json'
  }
}

The access to the swagger page seems fine onces it's running. I think it tries to access to the page during building when it does not exist yet because it comes from the webconsole, and the webconsole is not there yet?

There is way to run this command only in the server side. But it did not work for me. At the moment, I only can suppress it. I am still looking for a reasonable solution. Reverting this file can also be an option.

[gatici]

If the UPF and gnbs are missing where creating a new NS, the error message is no longer shown:

The messages are shown again.

[gatici]

If I delete a subscriber there are many error logs in the console

I do not see any error in the NMS container logs. If you still see it, Iet me know.

[gatici]

I am running into a issue when editing the subscribers:

1. Create a NS

2. Add a second DG to the that NS

3. Add a subscriber attached to the NS and a DG.

4. Edit the subscriber to change the DG.
   -> you need to refresh the page to show the Subscriber.
   This happens as well if I change the NS of the subscriber but its does not happen if I edit the text fields.

If I have 2 subscribers and I edit one of them to change the DG, only the one I edited disappears from the list.

I tested the subscriber edition using official image and the following scenario is not possible. Please see #711.

1. Create a NS
2. Add a second DG to the that NS
3. Add a subscriber attached to the NS and a DG.