Provide an option to create a project with "Mark as sensitive" flag

[in-1911]

Description

Allow the user to request the WatsonX project to be created with "Mark as sensitive" flag.

The SCC profile AI Guardrails 2 (v.1.1.0) checks for the project settings and flag projects not using the flag as non-compliant.
The flag can only be set when the project is created, so the DA should allow the users to deploy a compliant configuration.

Per https://api.dataplatform.cloud.ibm.com/v2/projects/docs/swagger/#/Projects/project_create, the settings.access_restrictions.data element can control the "Mark as sensitive" flag.

New or affected modules

configure_project/main.tf

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[ocofaigh]

@andreainnocenti do you know was this ever done?

[andreainnocenti]

not yet implemented

[in-1911]

I added a similar option in the sample app config- terraform-ibm-modules/terraform-ibm-rag-sample-da#171
We can remove it from there once the Watson SaaS DA has it.

[ocofaigh]

@kierramarie I have approved your PR. As per @in-1911 comment above, lets remove it from the sample app DA now.

[kierramarie]

@ocofaigh @in-1911 PR for removal has been opened. terraform-ibm-modules/terraform-ibm-rag-sample-da#201

[kierramarie]

@ocofaigh the rag sample da contains a watson-machine-learning module that uses the variable, does this need to be updated to use the da? As @brendankellyibm says in the PR, it needs to be refactored to remove the variable.