chore: Add Experimental to the fully configurable variation

[ocofaigh]

Description

Updated variation label to include the word "Experimental" until end to end flow is more user friendly. No release needed for this as the version currently published in prod is already updated

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[terraform-ibm-modules-ops]

🎉 This PR is included in version 3.59.1 🎉

The release is available on:

• GitHub release
• v3.59.1

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