feat: expose remote_leader_crn variable in fscloud and DA

[MatthewLemmond]

Description

Add the remote_leader_crn variable to the FS Cloud submodule and DA, expose in the ibm_catalog.json

resolves #195

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Release notes content

expose remote_leader_crn input in fscloud module and DA to allow provisioning of read only replicas

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[MatthewLemmond]

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[ocofaigh]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 1.7.0 🎉

The release is available on:

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• v1.7.0

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