feat(jit): enable hip kernel debug info

[kawhil-amd]

Motivation

Enable debugging of JIT-compiled kernels by adding debug symbol generation support. When troubleshooting kernel issues, developers need to inspect assembly with source-level debug info.

Technical Details

Add MORI_DEBUG_INFO environment variable to control hipcc debug flags in JIT compilation:

• config.py: add is_debuginfo_enabled() to detect MORI_DEBUG_INFO env var
• core.py: add _debuginfo_flags() returning ["-g", "-ggdb"] when enabled, integrate into _hipcc_genco()

When MORI_DEBUG_INFO=1, hipcc jit compiles with -g -ggdb flags alongside -O2.

Test Plan

MORI_PRECOMPILE=1 MORI_DEBUG_INFO=1 python -c "import mori"

Test Result

• The mori jit kernel pre-compilation test has been verified.

[jhchouuu]

LGTM
Can the mode switching be achieved during runtime?

[kawhil-amd]

LGTM Can the mode switching be achieved during runtime?

The mode switching function requires clearing the kernel cache first, will consider adding a kernel cache clearing feature later.