feature: Add ephemeral resource for provider resources

[rhughes1]

Proposal

As part of Terraform 1.10 ephemeral resources feature, there should be ephemeral resources for the following:

• Organization tokens: This is to resolve the token being stored in the Terraform state file.
• Team tokens: This is to resolve the token being stored in the Terraform state file.
• Workspace/variable set variables: This is to resolve any sensitive values that need to be set and not stored in the Terraform state file.
• Policy parameters: This is to resolve any sensitive values that need to be set and not stored in the Terraform state file.
• Agent pool tokens: This is to resolve the token being stored in the Terraform state file.
• Workspace runs: This is similar to the aws_lambda_revocation ephemeral resource

This applies to the following resources:

tfe_workspace_run
tfe_variable
tfe_test_variable
tfe_team_token
tfe_policy_set_parameter
tfe_organization_token
tfe_agent_token

[trutled3]

Is this slated for an upcoming release of the provider? If not, I would like to throw my hat in the ring and contribute this change.