`ethexe`: validation window must be bigger than finality time, which is not true in fast_sync test

[grishasobol]

                // TODO: temporary hack ignoring this error for fast_sync test.

In file ethexe/common/src/injected.rs

gear/ethexe/common/src/injected.rs

Line 226 in ee220e3

// Reach start announce is not correct case, because of can exists earlier announces with injected txs.