fix(logs): revert "exposed metric from the metric filter will now include the dimension map (#34648)" (#35102)

### Issue # (if applicable)

Closes #35097 .

### Reason for this change

This reverts commit fe5ef3a which introduced a regression in the logs module. More details in the [reported issue](#35097) itself

### Description of changes

Reverting the changes of commit fe5ef3a 

### Describe any new or updated permissions being added
NA

### Description of how you validated changes

Ran integ tests for the module and verified they are now working as expected

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: aemada-aws