## Problem
Currently, even if `LAMBDA_REMOTE_DOCKER=1`, we unzip the zip files in the directory they are in, which is usually /var/lib/localstack, which usually has a bind mount to the host.
On docker desktop, due to the use of grpc-FUSE (on macos), this can be very slow, about 200 times slower than on volumes / directly on the host. With experimental virtio filesystem enabled (also on macos), this can be reduced to about 30 times as slow, but still problematic.
This means a lambda may take a lot of time processing, for each additional layer some more. This especially affects nodejs lambdas with huge node_modules folders.

## Probable solution
At least if `LAMBDA_REMOTE_DOCKER=1`, we should leave the initial zip files on the bind mount (for persistence etc), but the working directories after unzipping should be located on non-bind mounts, to speed up the IO for unzipping.
region = LambdaRegion.get()
    try:
        code_signing_obj = region.code_signing_configs[arn]
    except KeyError:
        msg = "The Lambda code signing configuration %s can not be found." % (arn)
        return not_found_error(msg)
    data = json.loads(request.data)
    is_updated = False
    if data.get("Description"):
        code_signing_obj.description = data["Description"]
        is_updated = True
    if data.get("AllowedPublishers", {}).get("SigningProfileVersionArns"):
        code_signing_obj.signing_profile_version_arns = data["AllowedPublishers"][
            "SigningProfileVersionArns"
        ]
        is_updated = True
    if data.get("CodeSigningPolicies", {}).get("UntrustedArtifactOnDeployment"):
        code_signing_obj.untrusted_artifact_on_deployment = data["CodeSigningPolicies"][
            "UntrustedArtifactOnDeployment"
        ]
        is_updated = True
    if is_updated:
        code_signing_obj.last_modified = format_timestamp()
    result = {