Merge bitcoin#19214: Auto-detect SHA256 implementation in benchmarks

addf18d Call SHA256AutoDetect in benchmark setup (Pieter Wuille)

Pull request description:

  It seems `SHA256AutoDetect()` was not being called in benchmarks, making the numbers only reflect the naive implementation. Fix this by calling it in bench_bitcoin's setup.

ACKs for top commit:
  fjahr:
    tested ACK addf18d
  pstratem:
    ACK addf18d
  laanwj:
    ACK addf18d

Tree-SHA512: 3ba4b068145942df1429bf5913e3f685511e6ebeae2c1a3f9b8ac0144f6db1c7df456f88f480a2129f3e1602e3bf6a39530bb96e2c74c03ddb19324cec6799c7

Author: laanwj

src/bench/bench_bitcoin.cpp

@@ -41,6 +41,7 @@ int main(int argc, char** argv)
 {
     ArgsManager argsman;
     SetupBenchArgs(argsman);
+    SHA256AutoDetect();
     std::string error;
     if (!argsman.ParseParameters(argc, argv, error)) {
         tfm::format(std::cerr, "Error parsing command line arguments: %s\n", error);