As reported in https://github.com/localstack/localstack/issues/6659#issuecomment-1630932643_, `HeadObject` does not respect `ChecksumMode`. 


```shell
at 09:31:57 ➜ AWS_DEFAULT_REGION=us-west-1 aws --endpoint-url=http://localhost:4566 s3api create-bucket --bucket test-bucket --create-bucket-configuration LocationConstraint=us-west-1
{
    "Location": "http://test-bucket.s3.localhost.localstack.cloud:4566/"
}

at 09:32:13 ➜ aws --endpoint-url=http://localhost:4566 s3api put-object --bucket test-bucket --key file.json --body README.md --checksum-algorithm SHA256
{
    "ETag": "\"4bb2f1387449d690bff6336ea255909c\"",
    "ChecksumSHA256": "bzOikXXMUqRTCrpVq7Pt7LjJ0fjR3ccUfM19S/gnfqA="
}

# SHA256 missing here
at 09:32:20 ➜ aws --endpoint-url=http://localhost:4566 s3api head-object --bucket test-bucket --key file.json --checksum-mode Enabled
{
    "AcceptRanges": "bytes",
    "LastModified": "2023-07-11T13:32:15+00:00",
    "ContentLength": 1455,
    "ETag": "\"4bb2f1387449d690bff6336ea255909c\"",
    "ContentType": "binary/octet-stream",
    "Metadata": {}
}
```

Note the equivalent response from S3 actual includes the SHA256 value

```shell
at 10:21:23 ➜ aws s3api head-object --bucket test-bucket --key file.json --checksum-mode Enabled
{
    "AcceptRanges": "bytes",
    "Expiration": "expiry-date=\"Thu, 13 Jul 2023 00:00:00 GMT\", rule-id=\"all\"",
    "LastModified": "2023-07-11T14:21:09+00:00",
    "ContentLength": 1956,
    "ChecksumSHA256": "bj7fqCqtaF95M1ULwQRDJuHbL/Xd9NVMH6pua9OINcc=",
    "ETag": "\"f4be535d45019a4408dd5369986919f8\"",
    "ContentEncoding": "",
    "ContentType": "binary/octet-stream",
   
    "Metadata": {},
    
}
```

_Originally posted by @bdurrani in https://github.com/localstack/localstack/issues/6659#issuecomment-1630932643_
            
PutObjectTaggingOutput,
    PutObjectTaggingRequest,
    ReplicationConfiguration,
    ReplicationConfigurationNotFoundError,
    RequestPayer,
    S3Api,
    SkipValidation,
    StorageClass,
    Token,
)
from localstack.aws.api.s3 import Type as GranteeType
from localstack.aws.api.s3 import UploadPartOutput, UploadPartRequest, WebsiteConfiguration
from localstack.aws.handlers import (
    modify_service_response,
    preprocess_request,
    serve_custom_service_request_handlers,
)
from localstack.services.edge import ROUTER
from localstack.services.moto import call_moto
from localstack.services.plugins import ServiceLifecycleHook
from localstack.services.s3 import constants as s3_constants
from localstack.services.s3.cors import S3CorsHandler, s3_cors_request_handler
from localstack.services.s3.models import S3Store, get_moto_s3_backend, s3_stores
from localstack.services.s3.notifications import NotificationDispatcher, S3EventNotificationContext
from localstack.services.s3.presigned_url import (
    s3_presigned_url_request_handler,
    s3_presigned_url_response_handler,
    validate_post_policy,
)
from localstack.services.s3.utils import (