src: limit Buffer::kMaxLength to 1TB

This change has no real effect for now, as the V8 maximum typed array length is still 2**32. When V8 is updated to version 11.9 or later, the limit will be 2**53-1 on 64-bit architectures, much larger than any reasonable amount of RAM. This caps the limit at 1TB, which is already very large and corresponds to the maximum memory that AddressSanitizer allows to allocate.

Refs: https://github.com/nodejs/node/pull/49876 Refs: https://github.com/nodejs/node-v8/issues/268