fix(deps): update DA dependencies + add default value for prefix

[ocofaigh]

Description

• updated to latest secrets manager DA (which no longer has account config DA in it - so hence removal of iam permissions)
• add default value for prefix using new random generator feature

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[ocofaigh]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 1.3.0 🎉

The release is available on:

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• v1.3.0

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