Move common ASAN test case code into asan_common.subr

Reviewed by <kamil>

Disable profile and compat 32-bit c++ sanitizer tests

These tests are known to be faulty. These fatures aren't ready.
They tend to break to unrelated changes to the codebase.

Base Clang and GCC are

Disable profile and compat 32-bit c++ sanitizer tests

These tests are known to be faulty. These fatures aren't ready.
They tend to break to unrelated changes to the codebase.

Base Clang and GCC are in general dated to use with sanitizers as these
features are being fixed on HEAD versions of both compilers (mostly Clang).

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Add new ATF tests for Address Sanitzier (ASan)

Add new C and C++ tests:
- t_asan_double_free
- t_asan_global_buffer_overflow
- t_asan_heap_overflow
- t_asan_off_by_one
- t_asan_uaf

Each tests

Add new ATF tests for Address Sanitzier (ASan)

Add new C and C++ tests:
- t_asan_double_free
- t_asan_global_buffer_overflow
- t_asan_heap_overflow
- t_asan_off_by_one
- t_asan_uaf

Each tests checks:
- regular build
- 32-bit
- PIC
- PIE
- profile

These tests require paxctl(8) to disable ASLR in order to work in a
predictable way. This is especially true for all !regular builds with
additional compiler flags.

There are no static variations of these tests as this mode is not supported
in upstream ASan.

Enable these tests on amd64 and i386.

This is part two patch, adding the remaining C++ changes.

Patch submitted by <Siddharth Muralee>
Additional polishing by myself.

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