runtime panicked with `Transaction has a bad signature` at `#8077849`

[EclesioMeloJunior]

Describe the bug

• Gossamer sync stalls at block #8077849 with runtime panicking as shown in the image

[q9f]

caused by go-schnorrkel fix in response to the 2021 trail of bits audit, ref ChainSafe/go-schnorrkel#39

this fix is not present in rust schnorrkel and since these transactions made it to mainnet, we need to deal with them in a special case.