Return limit zksync (#459)

* validateCallLimit with limit param

* add call-validate-contract to zksync

* update reader

* fix error message

* rm disable-validation for testnets/sepolia

* fix tests

* split CallLimitValidator implementations for zksync and other eth

* add callLimitBlockNumber param

* mv callLimitBlockNumber to options

* upd docs

* rm callLimitBlockNumber options param and hardcode it
add zskync call limit validator check for debug_traceBlockByNumber is available

* zksync limit check only for mainnet

docs/reference-configuration.adoc

@@ -772,6 +772,17 @@ If it's set to `0` it essentially disables the peer validation.
 | Disables checking for the state of syncing on the upstream (as `eth_syncing` method).
 If the Upstream is in _syncing_ state then the Dshackle doesn't use it for call until it reaches the blockchain head.
 
+| `validate-call-limit`
+| boolean
+| `true`
+| Enable/Disable the call limit validation. Size of call limit is defined by `call-limit` option.
+If it's enabled configuration parameter for chain `call-limit-contract` is required.
+
+| `call-limit-size`
+| number
+| `1000000`
+| For all eth-like chains (except zkSync). The maximum size of the call limit. If the upstream exceeds this limit, it will be considered as failed.
+
 | `timeout`
 | number
 | `60`