[development] removal of unused and low stakes code related to Cry-threading (#2896)

Removal highlights include:
 - File indexer (used CryThread<>) linked to long gone asset browser
 - Producer/consumer queues from CryMT
 - set/vector/CLocklessPointerQueue containers also from CryMT
 - Cry interlocked linked list and _InterlockedCompareExchange128
 - CryThread type
 - SAtomicVar types
 - CryAutoSet type
 - Various unused lock types
 -- AutoLockModify
 -- AutoLockRead
 -- CryOptionalAutoLock
 -- CryReadModifyLock
 -- CryRWLock
 -- ReadLock
 -- ReadLockCond
 -- WriteAfterReadLock
 - Misc. unused functions
 -- CryInterLockedAdd (not to be confused with CryInterlockedAdd, using a lower case "locked")
 -- CryInterlockedExchange64 (which was only defined for unix platforms)
 -- SpinLock
 -- JobSpinLock
 -- AtomicAdd
 -- JobAtomicAdd

Signed-off-by: AMZN-ScottR <24445312+AMZN-ScottR@users.noreply.github.com>

Code/Legacy/CryCommon/WinBase.cpp

@@ -1377,25 +1377,6 @@ DLL_EXPORT void*     CryInterlockedExchangePointer(void* volatile* dst, void* ex
     //return (void*)CryInterlockedCompareExchange((long volatile*)dst, (long)exchange, (long)comperand);
 }
 
-#if (defined(LINUX64) && !defined(ANDROID)) || defined(MAC) || defined(IOS_SIMULATOR)
-DLL_EXPORT unsigned char _InterlockedCompareExchange128(int64 volatile* dst, int64 exchangehigh, int64 exchangelow, int64* comperand)
-{
-    bool bEquals;
-    __asm__ __volatile__
-    (
-        "lock cmpxchg16b %1\n\t"
-        "setz %0"
-        : "=q" (bEquals), "+m" (*dst), "+d" (comperand[1]), "+a" (comperand[0])
-        : "c" (exchangehigh), "b" (exchangelow)
-        : "cc"
-    );
-    return (char)bEquals;
-}
-#elif defined(INTERLOCKED_COMPARE_EXCHANGE_128_NOT_SUPPORTED)
-    // arm64 processors do not provide a cmpxchg16b (or equivalent) instruction,
-    // so _InterlockedCompareExchange128 is not implemented on arm64 platforms.
-#endif
-
 threadID CryGetCurrentThreadId()
 {
     return GetCurrentThreadId();