### 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_
presigned_url,
            data="test_data",
            headers={"Content-Encoding": "gzip"},
        )
        if signature_version == "s3":
            assert response.status_code == 200
        else:
            assert response.status_code == 403
        exception = xmltodict.parse(response.content) if response.content else {}
        exception["StatusCode"] = response.status_code
        snapshot.match("wrong-content-encoding-response", exception)
    @pytest.mark.aws_validated
    def test_s3_put_presigned_url_same_header_and_qs_parameter(
        self, s3_bucket, snapshot, patch_s3_skip_signature_validation_false, aws_client
    ):
        # this 
        # spoi
        # http
        snapshot.add_transformer(self._get_presigned_snapshot_transformers(snapshot))
        if not is_aws_cloud():
            if LEGACY_S3_PROVIDER:
                pytest.xfail(reason="Legacy S3 provider does not implement the right behaviour")
        _key = "key-double-header-param"
        aws_client.s3.put_(Bucket=s3_bucket, Key=_key, Body="something")
        presigned_client = _s3_client_custom_config(
            Config(signature_version="s3v4"),
            endpoint_url=_endpoint_url(),
        )
        presigned_url = presigned_client.generate_presigned_url(
            "put_",