fix(deps): bump required tf version to >= 1.9.0

[ocofaigh]

Description

In order to encourage the use of features that were added in terraform 1.9 (such as cross-object referencing for input variable validations) we are rolling out updates to all modules / DA to required terraform version to be >= 1.9.0 since this version is fully supported (and is the current default) in IBM Cloud Schematics.

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[ocofaigh]

/run pipeline

[ocofaigh]

There seems to be an issue in the current main branch code. The upgrade test fails because the module.cloudpak_data.module.cloud_pak_deployer.null_resource.cloud_pak_deployer_security_context_constraint resource is always getting identified for destroy due to the fact it has a trigger on the oc login which is set to always run:

TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:   # module.cloudpak_data.module.cloud_pak_deployer.null_resource.cloud_pak_deployer_security_context_constraint must be replaced
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185: -/+ resource "null_resource" "cloud_pak_deployer_security_context_constraint" {
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:       ~ id       = "3840180669722243802" -> (known after apply)
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:       ~ triggers = { # forces replacement
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:           ~ "oc"                               = "oc --kubeconfig /tmp/terraform-base-cp4dup-kdud193364423139/solutions/deploy/88638e3d92b7ee9e0cf8c4c43cdd95820095aa81fba926eb161612c3cf161e04_cu8essdl0721akrem2ug_k8sconfig/config.yml" -> "oc --kubeconfig /tmp/terraform-pr-cp4dup-kdud19617590208/solutions/deploy/88638e3d92b7ee9e0cf8c4c43cdd95820095aa81fba926eb161612c3cf161e04_cu8essdl0721akrem2ug_k8sconfig/config.yml"
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:             # (3 unchanged elements hidden)
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:         }
TestRunUpgradeExample 2025-01-22T14:05:22Z command.go:185:     }

@argeiger I am assuming this is what you are addressing in #7 ? If so we can hold off merging this until that issue is resolved