feat: added support for rhel9

[imprateeksh]

Description

This PR addresses the change to include RHEL9 in the module.
Issue - #590

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Release notes content

• Added support for RHEL9 (RHEL_9_64)

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[imprateeksh]

/run pipeline

[imprateeksh]

/run pipeline

[imprateeksh]

Updated multizone cluster example to use RHEL_9_64 operating system. As this test is part of other_tests.go , currently running test locally. Once completed will share the logs.

All resources were created successfully here, 500 errors were seen during destroy, resulting in test failure.

[imprateeksh]

Here are the logs for the mzr cluster but this has failed, though does not looks like failed because of RHEL_9_64 changes.
logs-mzr-eg.txt

Will give another try.

[imprateeksh]

The PR got failed due to some other error which is not related to the changes.

[imprateeksh]

/run pipeline

[imprateeksh]

other_tests - Passed test TestRunMultiClusterExample. Logs are shared here:
logs-mzr-eg-2.txt

[terraform-ibm-modules-ops]

🎉 This PR is included in version 3.40.0 🎉

The release is available on GitHub release

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