chore(query-nodes): camel case retention filter

[thmsobrmlr]

Problem

We want to clean up our query schema. See also #19541.

Changes

This PR camel cases all retentionFilter properties.

• retention_reference
• retention_type
• returning_entity
• target_entity
• total_intervals

How did you test this code?

Verified setting, saving and loading an insight with this filter works

[posthog-bot]

📸 UI snapshots have been updated

4 snapshot changes in total. 0 added, 4 modified, 0 deleted:

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

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[github-actions]

Size Change: 0 B

Total Size: 2 MB

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Filename	Size
frontend/dist/toolbar.js	2 MB

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[posthog-bot]

📸 UI snapshots have been updated

4 snapshot changes in total. 0 added, 4 modified, 0 deleted:

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

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[mariusandra]

Looks good from my brief look. However testing locally, I experienced the CSS bug again. Probably not up to date with master.

[thmsobrmlr]

Looks good from my brief look. However testing locally, I experienced the CSS bug again. Probably not up to date with master.

Yep, this is branched off from another refactor that was done before the css fixes in master.