Do not add L2 to L1 logs to the pubdata

[ilitteri]

L2 to L1 logs are being added to the pubdata construction for both Rollup and Validium modes.

On Validium mode the pubdata should be empty, so we need to avoid adding the L2 to L1 logs to it.

Lines: https://github.com/lambdaclass/zksync-era/blob/validium_mode_pubdata_0_env/core/lib/types/src/commitment.rs#L227-L231

[ilitteri]

Resolved in #42