Add WS image metrics to workspace instances

[filiptronicek]

Description

Adds workspace instance metrics to track image sizes. This includes storing metrics in the database, exposing them through the workspace instance status, and making them available via the API's WorkspaceService.ListWorkspaceSessions endpoint.

Related Issue(s)

Fixes CLC-1016

How to test

https://ft-add-ws-3faf28c13f.preview.gitpod-dev.com/workspaces

Try this in your browser console after starting a workspace (fill in your org ID or join mine so you don't have to):

const response = await fetch("https://ft-add-ws-3faf28c13f.preview.gitpod-dev.com/public-api/gitpod.v1.WorkspaceService/ListWorkspaceSessions", {
    "credentials": "include",
    "headers": {
        "User-Agent": "connect-es/1.1.2",
        "Accept": "*/*",
        "content-type": "application/json",
        "Sec-Fetch-Dest": "empty",
        "Sec-Fetch-Mode": "cors",
        "Sec-Fetch-Site": "same-origin",
        "Sec-GPC": "1",
    },
    "referrer": "https://ft-add-ws-3faf28c13f.preview.gitpod-dev.com/workspaces",
    "body": "{\"pagination\":{\"pageSize\":50},\"organizationId\":\"03a65446-6229-404d-b3ea-816b96533d85\"}",
    "method": "POST",
    "mode": "cors"
});
console.log(await response.json())

Under a workspace session in the response, you should see a metrics field.

[mustard-mh]

@filiptronicek let's revert copyright changes (I thought it means copyright since? But I'm not sure why generated files need copyright)

[filiptronicek]

I'd prefer to keep the year changes, since otherwise we'll have to keep reverting them every time. I don't see it being too harmful.

[mustard-mh]

LGTM 🚀

[geropl]

Comments would be 🥇

[filiptronicek]

Added in b8de461 (#20426) 🙏

[geropl]

Code LGTM, tested and works! ✔️