ci: Update Clang in "tidy" job

This change switches to the latest IWYU 0.23, which is compatible with
Clang 19.

Fixed new "modernize-use-starts-ends-with" warnings.

The new "bugprone-use-after-move" warning in `result_tests.cpp` is a
false positive caused by a bug in Boost.Test versions < 1.87. This has
been addressed by introducing a local variable.
See upstream references:
 - Issue: https://github.com/boostorg/test/issues/343
 - Fix: https://github.com/boostorg/test/pull/348

Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>

src/wallet/walletdb.cpp

@@ -1013,7 +1013,7 @@ static DBErrors LoadAddressBookRecords(CWallet* pwallet, DatabaseBatch& batch) E
             // "1" or "p" for present (which was written prior to
             // f5ba424cd44619d9b9be88b8593d69a7ba96db26).
             pwallet->LoadAddressPreviouslySpent(dest);
-        } else if (strKey.compare(0, 2, "rr") == 0) {
+        } else if (strKey.starts_with("rr")) {
             // Load "rr##" keys where ## is a decimal number, and strValue
             // is a serialized RecentRequestEntry object.
             pwallet->LoadAddressReceiveRequest(dest, strKey.substr(2), strValue);