Test fix from https://github.com/MystenLabs/sui/pull/17934

[wlmyng]

Description

Adds e2e tests to the sui-graphql-e2e-tests suite to test new behavior from MystenLabs#17934

The nested_dof.move tests behavior of a Parent -> Child1 -> Child2 setup, while the immutable_dof.move tests state when we make Child1 of the same setup immutable.

Btw, I'm not that good with github foo, so this is what I came up with. Lmk if there's an easier way to land these commits!

Test plan

New tests

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[unmaykr-aftermath]

Fair enough, this is also the first time I'm in a situation where someone wants to add commits to my PR's fork 😅