Migrate get link modal to be pure and use Redux

[tkbky]

Summary

Migrate get link modal to be pure and use Redux.

Ticket Link

mattermost-server/issues/7679

Checklist

• Added or updated unit tests (required for all new features)

[tkbky]

@saturninoabril Here is the PR. I'm stuck at getting the tests passed because of some unsupported DOM API by jsdom, namely queryCommandSupported and execCommand.

Related issues on jsdom:

• document.execCommand() method not supported jsdom/jsdom#1539
• Add execCommand / queryCommandSupported jsdom/jsdom#1742

Another finding is using the Object.defineProperty on document doesn't seem to work because of the Unforgeable properties in document that makes it not configurable as mentioned in this issue

[saturninoabril]

@tkbky I've found a workaround, on mocking like:

const supportedCommands = ['copy'];

Object.defineProperty(document, 'queryCommandSupported', {
  value: (cmd) => supportedCommands.includes(cmd)
});

Object.defineProperty(document, 'execCommand', {
  value: (cmd) => supportedCommands.includes(cmd)
});

Also added/modified some tests.

[saturninoabril]

Looks good to me. Thanks!

[tkbky]

@saturninoabril That looks great! Thanks for making the PR way better. 😄

[jwilander]

Awesome, thanks @tkbky