[Issue]: [UB] memory_peers_paths is missing null terminator causing out of bound reads

[LunNova]

ncclIbGdrSupport reads out of bounds if none of the files in memory_peers_paths exist because it relies on a null entry at the end which is missing. This can cause a confusing crash on systems on a mainline Linux kernel.

rccl/src/transport/net_ib.cc

Lines 587 to 601 in 648a58d

	const char* memory_peers_paths[] = {"/sys/kernel/mm/memory_peers/amdkfd/version",
	"/sys/kernel/memory_peers/amdkfd/version",
	"/sys/memory_peers/amdkfd/version"};
	int i = 0;
	while (memory_peers_paths[i]) {
	if (access(memory_peers_paths[i], F_OK) == 0) {
	moduleLoaded = 1;
	INFO(NCCL_INIT,"Found %s", memory_peers_paths[i]);
	break;
	} else {
	moduleLoaded = 0;
	}
	++i;
	}

/build/source/build/hipify/src/transport/net_ib.cc:592:12: runtime error: index 3 out of bounds for type 'const char *[3]'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /build/source/build/hipify/src/transport/net_ib.cc:592:12 
=================================================================
==4070438==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ff82df5b038 at pc 0x7fff7c15a3b5 bp 0x7ff8312e28f0 sp 0x7ff8312e28e8
READ of size 8 at 0x7ff82df5b038 thread T6
    #0 0x7fff7c15a3b4 in ncclIbGdrSupport() /build/source/build/hipify/src/transport/net_ib.cc:592:12
    #1 0x7fff7c15adfe in ncclIbGetProperties(int, ncclNetProperties_v8_t*) /build/source/build/hipify/src/transport/net_ib.cc:688:7
    #2 0x7fff7bf38198 in ncclNetCheckDeviceVersion(ncclComm*, ncclNet_v8_t*, int) /build/source/build/hipify/src/net.cc:501:3
    #3 0x7fff7bf388d5 in ncclNetInit(ncclComm*) /build/source/build/hipify/src/net.cc:562:24
    #4 0x7fff7bf0b0ad in commAlloc(ncclComm*, ncclComm*, int, int) /build/source/build/hipify/src/init.cc:533:3
    #5 0x7fff7bf00395 in ncclCommInitRankFunc(ncclAsyncJob*) /build/source/build/hipify/src/init.cc:2002:5
    #6 0x7fff7bee824e in ncclAsyncJobMain(void*) /build/source/build/hipify/src/group.cc:67:17
    #7 0x7ffff749f0d4 in asan_thread_start(void*) (/nix/store/7r6z6nb443psc1ghiyjlqmhwkll7wiia-clr-6.3.0/llvm/lib/linux/libclang_rt.asan-x86_64.so+0x9f0d4)
    #8 0x7ffff69b0d01 in start_thread (/nix/store/pacbfvpzqz2mksby36awvbcn051zcji3-glibc-2.40-36/lib/libc.so.6+0x90d01) (BuildId: 2de6548b3bd2f2857c3c1d5f85e5e817ce2c4a7e)
    #9 0x7ffff6a303ab in __GI___clone3 (/nix/store/pacbfvpzqz2mksby36awvbcn051zcji3-glibc-2.40-36/lib/libc.so.6+0x1103ab) (BuildId: 2de6548b3bd2f2857c3c1d5f85e5e817ce2c4a7e)

Address 0x7ff82df5b038 is located in stack of thread T6 at offset 56 in frame
    #0 0x7fff7c159ae7 in ncclIbGdrSupport() /build/source/build/hipify/src/transport/net_ib.cc:568

  This frame has 3 object(s):
    [32, 56) 'memory_peers_paths' (line 587) <== Memory access at offset 56 overflows this variable
    [96, 351) 'strValue' (line 603)
    [416, 672) 'buf' (line 613)

Related to #1454