ac58e6c53c test: fix P2SH output in coins cache fuzz (Lőrinc)
Pull request description:
### Problem
`coinscache_sim` manually constructs a 23-byte P2SH `scriptPubKey`, but placed `OP_EQUAL` at byte index 12.
That index is inside the 20-byte script hash payload, so the constructed script did not match the standard P2SH layout:
fa2670bd4b/src/script/script.cpp (L223-L230)
### Fix
Place `OP_EQUAL` after `OP_HASH160`, the 20-byte push opcode, and the 20-byte script hash.
Also remove a stray trailing comment terminator in the same fuzz target.
ACKs for top commit:
Crypt-iQ:
crACK ac58e6c53c
brunoerg:
ACK ac58e6c53c
sedited:
ACK ac58e6c53c
Tree-SHA512: 1f909dd25d9df87a923e6496145da0ada2b1fa6511b61fb2d203db4c7724f2341c898862a15e7051b952bca834e6654c70fba64a7bf223bfd6d399b3b5d9e59b
6690117c7a