Merge bitcoin/bitcoin#30725: fuzz: fix timeout in `crypto_fschacha20p…

…oly1305`

8dec4e1 fuzz: fix timeout in `crypto_fschacha20poly1305` (brunoerg)

Pull request description:

  Fixes #30505

  This PR fixes a timeout in `crypto_fschacha20poly1305` by reducing the number of iterations. I left it running for a while and noticed it speeds up the target and do not impact coverage.

ACKs for top commit:
  maflcko:
    lgtm ACK 8dec4e1
  stratospher:
    ACK 8dec4e1. saw similar coverage stats (these are from different machines, saw more similar from same machine).

Tree-SHA512: 66cd689f10f09cf880c1f2c77aa481336a95a7e10b655d156b2dc9cd38165670000019a6fb3775485ccb5cce248939a52a31ebd755a6befed6274cc841d21d97

src/test/fuzz/crypto_chacha20poly1305.cpp

@@ -130,7 +130,7 @@ FUZZ_TARGET(crypto_fschacha20poly1305)
     // data).
     InsecureRandomContext rng(provider.ConsumeIntegral<uint64_t>());
 
-    LIMITED_WHILE(provider.ConsumeBool(), 10000)
+    LIMITED_WHILE(provider.ConsumeBool(), 100)
     {
         // Mode:
         // - Bit 0: whether to use single-plain Encrypt/Decrypt; otherwise use a split at prefix.