Terraform / Cloudformation - Pass parameter as YAML - amazon-web-services

Question

I use Terraform to launch a Cloudformation stack to create Glue Databrew resources that don't exist yet on Terraform.
The thing is that I've a variable in Terraform that corresponds to the list of my data sources and in order to create the databrew resources associated to this data, I loop over my list to create one instance of my Cloudformation template for each data source.
Inside this template, I've a resource that I want to be different per data source. It correspond to the AWS::DataBrew::Ruleset resource.
It looks like this :
DataBrewDataQualityRuleset:
Type: AWS::DataBrew::Ruleset
Properties:
Name: !Ref RuleSetName
Description: Data Quality ruleset
Rules:
- Name: Check columns for missing values
Disabled: false
CheckExpression: AGG(MISSING_VALUES_PERCENTAGE) == :val1
SubstitutionMap:
- ValueReference: ":val1"
Value: '0'
ColumnSelectors:
- Regex: ".*"
- Name: Check two
Disabled: false
CheckExpression: :col IN :list
SubstitutionMap:
- ValueReference: ":col"
Value: "`group`"
- ValueReference: ":list"
Value: "[\"Value1\", \"Value2\"]"
TargetArn: !Sub SomeArn
What I want to do is, extract the Rules part of the component and create one file where I will put all my rules per data sources. In fact having something like below :
DataBrewDataQualityRuleset:
Type: AWS::DataBrew::Ruleset
Properties:
Name: !Ref RuleSetName
Description: Data Quality ruleset
Rules: !Ref Rules
TargetArn: !Sub SomeArn
And in my terraform, my Rules parameter would be my actual set of rules for one particular data source.
I've thought about having one YAML file from which I would loop on terraform but I'm not sure it's doable and if cloudformation would accept YAML as parameter type.
Below you'll also find my terraform component :
resource "aws_cloudformation_stack" "databrew_jobs" {
for_each = var.data_sources
name = "datachecks-${each.value.stack_name}"
parameters = {
Bucket = "test_bucket"
DataSetKey = "raw/${each.value.job_name}"
DataSetName = "dataset-${each.value.stack_name}"
RuleSetName = "ruleset-${each.value.stack_name}"
JobName = "profile-job-${each.value.stack_name}"
DataSourceName = "${each.value.stack_name}"
JobResultKey = "databrew-results/${each.value.job_name}"
RoleArn = iam_role_test.arn
}
template_body = file("${path.module}/databrew-job.yaml")
}
Do you have any idea how could I achieve this ?
Thanks in advance !