Static session requests does not respect lifetime fields nbf and iat.

[abereziny]

When static session is created it have lifetime fields exp, nbf, iat.

Currently, only exp field is checked during requests.
nbf and iat are ignored.

1. Create 2 object session tokens with expiration fields like:

"lifetime": {
            "exp": "100000000",
            "nbf": "<current epoch> + 1",
            "iat": "<current epoch>"
        },

and

"lifetime": {
            "exp": "100000000",
            "nbf": "<current epoch>",
            "iat": "<current epoch> + 10"
        },

2. Sign both tokens
3. Using these static session_tokens make 2 requests to grpc (one for each token)

neofs-cli --config wallet_config.yml object head --rpc-endpoint '172.26.163.161:8080' --wallet '38d0e55d-6cac-447d-97fc-954965271d09.json' --cid '5chibTkwxuxNEaS1JnK7oENZ9dVHU4RhjkgDa66kZu9N' --oid 'ApiU6rPXYMZN7GPS24MAEH2GAvBrn4mg8Cg4M3gtK6se' --json --session 'aff7610f-60bb-4e7b-b9d8-5c6ceb0bf352'

Expected Behavior

For both tokens there should be error with reason of failure

Error:
return code: 1 
Output: rpc error: read object header via client: status: code = 1024 message = malformed request <reason of failure>

Current Behavior

Both requests passed successfully

Autotests

in feature branch
https://github.com/abereziny/neofs-testcases/tree/feature/abereziny-add-object-static-session-tests
testsuites.session_token.test_object_session_token#test_static_session_start_at_next
testsuites.session_token.test_object_session_token#test_static_session_invalid_issued_epoch

[fyrchik]

Closed via #2041