Implement memory allocation interceptors for full 64 bit support

[fmoessbauer]

Currently, only the lower 32 bit of each memory address are considered for race-detection. For the PoC this was sufficient, but for real applications the full addresses have to be analyzed.

The reason behind this decision was to avoid changes to the memory mapping table of TSAN. To properly handle all accesses, we have to make sure that all memory we want to track is inside either the EXECUTABLE region or inside a heap.

Thereto, we have to shift all heaps inside a shadowable region or alternatively change the regions in TSAN.

[fmoessbauer]

TSAN-Go has some strict assumptions on the memory layout of the go heap, including:

• The heap grows contiguously (and only up)
• The memory is aligned to a page boundary

For details on this topic, see also:

• runtime/race: simplify meta shadow mapping golang/go#24133
• runtime: windows tests fail with race detector golang/go#23900

As we do not change the behavior of the application under test, it will be tricky to fulfill these constraints.