### 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_
base_redirect: str, bucket: BucketName, key: ObjectKey, etag: ETag
):
    """
    POST requests can redirect if successful. It will take the URL provided and append query string parameters
    (key, bucket and ETag). It needs to be a full URL.
    :param base_redirect: the URL provided for redirection
    :param bucket: bucket name
    :param key: key name
    :param etag: key ETag
    :return: the URL provided with the new appended query string parameters
    """
    parts = urlparse(base_redirect)
    if not parts.netloc:
        raise ValueError("The provided URL is not valid")
    queryargs = parse_qs(parts.query)
    queryargs["key"] = [key]
    queryargs["bucket"] = [bucket]
    queryargs["etag"] = [etag]
    redirect_queryargs = urlencode(queryargs, doseq=True)
    newparts = (
        parts.scheme,
        parts.netloc,
        parts.path,
        parts.params,
        redirect_queryargs,
        parts.fragment,
    )
    return urlunparse(newparts)
def apply_moto_patches():