fix(insights): only show confirmation when navigating to new url

[thmsobrmlr]

Problem

We show the "Leave insight?" confirmation when navigating to a new insight via the urls.insightNew helper.

Repro:

• Go to a new insight (to load the insightSceneLogic)
• Go to web analytics
• Click on "Open as new insight"
• Observe that the "Leave insight?" confirmation is triggered
• This is because of internal redirects -> we should ignore those in the insightSceneLogic

Changes

This is because we redirect from non-project URLs to project URLs and vice-versa (/project/1/insight/new vs /insight/new). Removing the project part from both pathnames makes our existing check work.

How did you test this code?

Tried the repro before and after

[github-actions]

Size Change: 0 B

Total Size: 1.07 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	1.07 MB

_{compressed-size-action}

[posthog-bot]

📸 UI snapshots have been updated

3 snapshot changes in total. 0 added, 3 modified, 0 deleted:

• chromium: 0 added, 3 modified, 0 deleted (diff for shard 1, diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[robbie-c]

Nice one, just tested it locally and it works