Update to Glean v38.0.0

[badboy]

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[mhammond]

There is some rusqlite/libsqllite confusion that's technically unrelated to this PR - that does imply some limitations in our dep checker script, but I've come to the conclusion that rather than trying to fix that it's easier to just take the change in the generated output - so I'm going to just take this as it and kill 2 birds with 1 stone.