use WithNewResourceGroup context manager to avoid resource collision

[whoffler]

Description

for issue - https://github.ibm.com/GoldenEye/issues/issues/14658

use WithNewResourceGroup context manager so tests avoid resource collision

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[shemau]

LGTM

[whoffler]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 2.0.10 🎉

The release is available on:

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• v2.0.10

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