Core/Authserver: Authserver cleanup (PR#25093)

- Fix a handful of 1/256 bugs with most significant byte zero in BigNumber
- Get rid of (most of) the C-style arrays in authserver
- CryptoRandom as a unified source for cryptographic randomness
- Bring our other crypto APIs into 2020
- BigNumber usability improvements
- Authserver is now actually readable as a result of all of the above

(cherry picked from commit 210176fd91)

src/server/game/Scripting/ScriptReloadMgr.cpp

@@ -40,13 +40,14 @@ ScriptReloadMgr* ScriptReloadMgr::instance()
 #include "BuiltInConfig.h"
 #include "Config.h"
 #include "GitRevision.h"
+#include "CryptoHash.h"
 #include "Log.h"
 #include "MPSCQueue.h"
 #include "Regex.h"
 #include "ScriptMgr.h"
-#include "SHA1.h"
 #include "StartProcess.h"
 #include "Timer.h"
+#include "Util.h"
 #include "World.h"
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/filesystem.hpp>
@@ -758,7 +759,7 @@ private:
         auto path = fs::temp_directory_path();
         path /= Trinity::StringFormat("tc_script_cache_%s_%s",
             GitRevision::GetBranch(),
-            CalculateSHA1Hash(sConfigMgr->GetFilename()).c_str());
+            ByteArrayToHexStr(Trinity::Crypto::SHA1::GetDigestOf(sConfigMgr->GetFilename())).c_str());
 
         return path;
     }