Add -fsanitize=integer suppression needed for RPC fuzzer (generateblock).
Context: https://github.com/bitcoin-core/qa-assets/pull/59/checks?check_run_id=2494624259
miner.cpp:130:21: runtime error: implicit conversion from type 'int64_t' (aka 'long') of value 244763573890 (64-bit, signed) to type 'uint32_t' (aka 'unsigned int') changed the value to 4245405314 (32-bit, unsigned)
[#0](/bitcoin-bitcoin/0/) 0x56143974eaf3 in BlockAssembler::CreateNewBlock(CScript const&) miner.cpp:130:21
[#1](/bitcoin-bitcoin/1/) 0x56143993690d in generateblock()::$_4::operator()(RPCHelpMan const&, JSONRPCRequest const&) const rpc/mining.cpp:370:127