### 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_
key = "my-key"
        with 
            aws_client.s3.get_(Bucket=s3_bucket, Key=key, Range="bytes=1024-4096")
        snapshot.match("exc", e.value.response)
    @pytest.mark.aws_validated
    def test_create_bucket_via_host_name(self, s3_vhost_client, aws_client):
        # TO
        # ht
        bucket_name = f"test-{short_uid()}"
        try:
            response = s3_vhost_client.create_bucket(
                Bucket=bucket_name,
                CreateBucketConfiguration={"LocationConstraint": "eu-central-1"},
            )
            assert "Location" in response
            assert response["ResponseMetadata"]["HTTPStatusCode"] == 200
            response = s3_vhost_client.get_bucket_location(Bucket=bucket_name)
            assert response["ResponseMetadata"]["HTTPStatusCode"] == 200
            assert response["LocationConstraint"] == "eu-central-1"
        finally:
            s3_vhost_client.delete_bucket(Bucket=bucket_name)
    @pytest.mark.aws_validated
    def test_put_and_get_bucket_policy(self, s3_bucket, snapshot, aws_client):