TPT-3909: Integration tests for IAM volumes io_ready

[mawilk90]

📝 Description

NOTES:

1. PR directly to main because the developers code is already there
2. Currently blocked as API possibly does not work as expected: TestIAM_GetIOReadyForClonedVolume - SKIPPED

IAM team added io_ready field in responses from Volumes endpoints.

✔️ How to Test

Without fixtures:
go test -count=1 ./test/integration/ -v -run TestIAM_GetIOReadyFor

With fixtures:
make test-int TEST_ARGS="-run TestIAM_GetIOReadyFor"

[Copilot]

Pull request overview

Adds integration test coverage for the new io_ready field returned by IAM-enabled Volumes endpoints, plus a helper wait function to poll until a volume reaches the desired io_ready state.

Changes:

• Added Client.WaitForVolumeIOReadyStatus polling helper.
• Extended existing volume update integration test to assert IOReady is false for unattached volumes.
• Added new IAM-focused integration tests (with recorded fixtures) validating io_ready across list/get/attach/detach/update/resize scenarios (clone test currently skipped).

Reviewed changes

Copilot reviewed 4 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
waitfor.go	Adds a wait helper that polls volume io_ready until it matches an expected value.
test/integration/volumes_test.go	Asserts IOReady is false after updating an unattached volume.
test/integration/iam_io_ready_test.go	New IAM integration tests validating io_ready behavior across volume lifecycle operations (including a skipped clone test).
test/integration/fixtures/TestIAM_GetIOReadyForUpdatedVolume.yaml	Recorded interactions including io_ready values for updated-volume scenario.
test/integration/fixtures/TestIAM_GetIOReadyForNotAttachedVolume.yaml	Recorded interactions including io_ready values for unattached-volume scenario.

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