gdb/testsuite: add HIP graph-launch kernel debugging test

[spatrang]

Summary

Adds a new gdb.rocm dejagnu test, hip-graph-launch, covering debugging of
kernels dispatched through a HIP graph (hipGraphLaunch) rather than a plain
kernel<<<>>>() launch. The program captures two kernels (add_one then
times_three) from a stream into a single graph, instantiates it, and replays
it 3 times; each replay computes out = (out + 1) * 3 (0 -> 3 -> 12 -> 39).

The test exercises the graph-specific debugger behavior:

• pending breakpoints in graph-launched kernels resolve and hit,
• both graph nodes stop in order on every replay (dispatch numbering / re-dispatch),
• correct per-replay data is observed at each node,
• symbol breakpoint + backtrace + kernel-argument inspection,
• single-stepping inside a graph-launched kernel mutates device memory,
• info dispatches reports the active dispatch and associates it with the kernel.

Test plan

Validated 22/22 assertions under both GCC and LLVM host compilers on gfx942
(MI300X), against:

• locally built ROCgdb (gdb 18.0.50), and
• nightly ROCm 7.14 rocgdb (gdb 16.3).

JIRA

AIROCGDB-580

[spatrang]

Rebased onto latest amd-staging to pick up the record-full.c build fix and re-trigger CI.

[lancesix]

Just minor comments for now, will get a deeper review at a later time.

[spatrang]

Addressed review comments :

• Use the shared CHECK macro from rocm-test-utils.h instead of a local copy.
• num_elems is now constexpr.
• Keep the replay count in sync: the .exp passes -DNUM_REPLAYS=$num_replays and the source guards the define with #ifndef (per the nonstop-mode.exp pattern).

Also rebased onto latest amd-staging.