### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

CopyObject API does not check precondition headers such as `x-amz-copy-source-if-modified-since`. Instead it seems to always copy the object.

### Expected Behavior

The API should return a 412 response with content similar to:

```
<Error><Code>PreconditionFailed</Code><Message>At least one of the pre-conditions you specified did not hold</Message><Condition>x-amz-copy-source-If-Modified-Since</Condition><RequestId>14HR9PXJRG5B1GR5</RequestId><HostId>HztBs2jYea1fzzPWo1JWy33NQJqo1S1IsK62rkbnVEI04PnGNCi8sPVrichGQxH3FQwLA2RIyF4=</HostId></Error>
```

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    docker run localstack/localstack

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

```
aws s3  --profile localstack --endpoint-url http://s3.localhost.localstack.cloud:4566 \
  ls s3://net-amazon-s3-test/Makefile.am
2023-01-25 10:47:40        537 Makefile.am

aws s3api copy-object --copy-source net-amazon-s3-test/Makefile.am --key Makefile.am.2 \
  --bucket net-amazon-s3-test2 --profile localstack --endpoint-url http://s3.localhost.localstack.cloud:4566 \
  --copy-source-if-modified-since "Wed, 25 Jan 2023 16:16:27 GMT"
{
    "CopyObjectResult": {
        "ETag": "\"46ada9d1fe8f8a311ff4504c226e061c\"",
        "LastModified": "2023-01-25T16:18:43+00:00"
    }
}
```

### Environment

```markdown
- OS: penguin
- LocalStack: latest
```


### Anything else?

_No response_
self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> None:
        call_moto(context)
        self._clear_bucket_from_store(bucket)
        self._cors_handler.invalidate_cache()
    def get_bucket_location(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketLocationOutput:
        """
        When implementing the ASF provider, this operation is implemented because:
        - The spec defines a root element GetBucketLocationOutput containing a LocationConstraint member, where
          S3 actually just returns the LocationConstraint on the root level (only operation so far that we know of).
        - We circumvent the root level element here by patching the spec such that this operation returns a
          single "payload" (the XML body response), which causes the serializer to directly take the payload element.
        - The above "hack" causes the fix in the serializer to not be picked up here as we're passing the XML body as
          the payload, which is why we need to manually do this here by manipulating the string.
        Botocore implements this hack for parsing the response in `botocore.handlers.py#parse_get_bucket_location`
        """
        response = call_moto(context)
        location_constraint_xml = response["LocationConstraint"]
        xml_root_end = location_constraint_xml.find(">") + 1
        location_constraint_xml = (
            f"{location_constraint_xml[:xml_root_end]}\n{location_constraint_xml[xml_root_end:]}"
        )
        response["LocationConstraint"] = location_constraint_xml[:]
        return response
    @handler("ListObjects", expand=False)
    def list_objects(