### 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_
@pytest.mark.only_localstack
    def test_terraform_request_sequence(self, aws_client):
        reqs = load_file(os.path.join(os.path.dirname(__file__), "../files", "s3..txt"))
        reqs = reqs.split("---")
        for req in reqs:
            header, _, body = req.strip().partition("\n\n")
            req, _, headers = header.strip().partition("\n")
            headers = {h.split(":")[0]: h.partition(":")[2].strip() for h in headers.split("\n")}
            method, path, _ = req.split(" ")
            url = f"{config.get_edge_url()}{path}"
            result = .request(method=method, url=url, data=body, headers=headers)
            assert result.status_code < 400
class TestS3PresignedUrl:
    """
    These tests pertain to S3's  feature.
    """
    # # Note: This test may have side effects (via `s3_client.meta.events.register(..)`) and
    # # may not be suitable for parallel execution
    @pytest.mark.aws_validated
    def test_presign_with_additional_query_params(