Automatic merge from submit-queue (batch tested with PRs 51193, 51154, 42689, 51189, 51200)

Re-enable OIR e2e tests.

Re-enabling test skeleton for opaque integer resources originally submitted as part of #41870. The e2e was disabled since it was flaky. This is the first step toward re-enabling them. Currently all cases are skipped, so this exercises only the BeforeEach behavior and the deferred removal of OIRs from a node.

cc @timothysc