AWS::ElasticLoadBalancingV2::TargetGroup .Tags always in Drift

## 1. Title
Adding tags in cloudformation to `AWS::ElasticLoadBalancingV2::TargetGroup` always come to drift

## 2. Scope of request
Creating a AWS::ElasticLoadBalancingV2::TargetGroup from a CloudFormation template with a Tags section always give me a Drift status, but the tags where created succesfully.
Deleting the TAG block from yaml file, upload stack, readd tag block, upload stack: same issue

## 3. Expected behavior
No drift detected

## 4. Suggest specific test cases
```
Tags:
- Key: Name
Value: !Sub
- '${ProjectName}-${Env}-${ApplicationName}-tg'
- Env: !FindInMap [Constants, Environment, !Ref Environment]
- Key: Environment
Value: !Ref Environment
- Key: Project
Value: !Ref ProjectName
```

## 5. Helpful Links to speed up research and evaluation

## 6. Category (required) - Will help with tagging and be easier to find by other users to +1
1. Compute (TargetGroup)
2. Management (CloudFormation)

## 7. Any additional context (optional)

Start by reproducing the issue with the supplied CloudFormation YAML and an AWS::ElasticLoadBalancingV2::TargetGroup, then compare the declared and reported tags during drift detection. Done means the resource's tags are created successfully and the stack reports no drift when the template and deployed resource match.

Written by the indexing model from the issue text.