Calculate gpu_map for parseGraph if devIds != Ranks for NCCL_RINGS

[BKitor]

When using NCCL_RINGS, parseGraph can fail if ROCR_VISIBLE_DEVICES is set. If the visible devices aren't consecutively numbered form 0, a gpu_map is needed .
This patch adds a check to build a gpu_map if NCCL_RINGS is set. The mapping retains GPU device number ordering, and should let users/developers easily explore RCCL performance over subsets of their system.
Users can use NCCL_RIGNS, where specified values correspond to RCCL 'ranks'

Falure with ROCM 6.1:

(base) user@supergenoa5:~/bkitor$ ./run_rccl-test-4g.sh
	librccl.so.1 => /opt/rocm-6.1.0/lib/llvm/bin/../../../lib/librccl.so.1 (0x00007fca1aa00000)
NCCL_RINGS		=1 2 3 0 | 0 3 2 1 | 1 3 2 0 | 0 2 3 1 | 1 2 0 3 | 3 0 2 1
ROCR_VISIBLE_DEVICES	=4,5,6,7
/home/user/rccl-tests/build/all_reduce_perf -g 4 -c 1 -t 1
# nThread 1 nGpus 4 minBytes 33554432 maxBytes 33554432 step: 1048576(bytes) warmup iters: 5 iters: 20 agg iters: 1 validation: 1 graph: 0
#
rccl-tests: Version develop:c5cae38
# Using devices
#   Rank  0 Pid  40875 on supergenoa5 device  0 [0000:ad:00.0] AMD Instinct MI300X
#   Rank  1 Pid  40875 on supergenoa5 device  1 [0000:b2:00.0] AMD Instinct MI300X
#   Rank  2 Pid  40875 on supergenoa5 device  2 [0000:b6:00.0] AMD Instinct MI300X
#   Rank  3 Pid  40875 on supergenoa5 device  3 [0000:ba:00.0] AMD Instinct MI300X
supergenoa5: Test NCCL failure /home/user/rccl-tests/build/hipify/common.cu.cpp:1262 'internal error - please report this issue to the NCCL developers / '
 .. supergenoa5 pid 40875: Test failure /home/user/rccl-tests/build/hipify/common.cu.cpp:1140

Expected results with proposed patch:

	librccl.so.1 => /home/user/bkitor/rccl/build/lib/librccl.so.1 (0x00007f8046600000)
NCCL_RINGS		=1 2 3 0 | 0 3 2 1 | 1 3 2 0 | 0 2 3 1 | 1 2 0 3 | 3 0 2 1
ROCR_VISIBLE_DEVICES	=4,5,6,7
/home/user/rccl-tests/build/all_reduce_perf -g 4 -c 1 -t 1
# nThread 1 nGpus 4 minBytes 33554432 maxBytes 33554432 step: 1048576(bytes) warmup iters: 5 iters: 20 agg iters: 1 validation: 1 graph: 0
#
rccl-tests: Version develop:c5cae38
# Using devices
#   Rank  0 Pid  40898 on supergenoa5 device  0 [0000:ad:00.0] AMD Instinct MI300X
#   Rank  1 Pid  40898 on supergenoa5 device  1 [0000:b2:00.0] AMD Instinct MI300X
#   Rank  2 Pid  40898 on supergenoa5 device  2 [0000:b6:00.0] AMD Instinct MI300X
#   Rank  3 Pid  40898 on supergenoa5 device  3 [0000:ba:00.0] AMD Instinct MI300X
#
#                                                              out-of-place                       in-place
#       size         count      type   redop    root     time   algbw   busbw #wrong     time   algbw   busbw #wrong
#        (B)    (elements)                               (us)  (GB/s)  (GB/s)            (us)  (GB/s)  (GB/s)
    33554432       8388608     float     sum      -1    389.9   86.07  129.10      0    395.0   84.95  127.42      0
# Errors with asterisks indicate errors that have exceeded the maximum threshold.
# Out of bounds values : 0 OK
# Avg bus bandwidth    : 128.26