Error: Invalid count argument when password comes from an aws_ssm_parameter resource

### Describe the Bug

```
│ Error: Invalid count argument
│
│ on .terraform/modules/cms.db/main.tf line 54, in resource "random_password" "password":
│ 54: count = module.this.enabled && var.master_password == "" ? 1 : 0
│
│ The "count" value depends on resource attributes that cannot be determined until apply, so Terraform cannot predict how many instances will be created. To work around this, use the -target argument to first apply only the resources that the count depends on.
```

### Expected Behavior

Terraform plan can be applied without resource targeting.

### Steps to Reproduce

set password to the value of an ssm param, for example:
```
master_password = aws_ssm_parameter.db_password.value
```

### Screenshots

_No response_

### Environment

Terraform 1.5

### Additional Context

_No response_

Start by reproducing the configuration in the issue with Terraform 1.5 and an aws_ssm_parameter value. Inspect .terraform/modules/cms.db/main.tf at the random_password resource on line 54 and trace how its count depends on master_password. Done means Terraform can plan and apply this configuration without resource targeting.

Written by the indexing model from the issue text.