WIP: Updating gdb-oneapi debugging reference docs

[rohan11235813]

• [x] Have you provided a meaningful PR description?
• [x] Have you added a test, reproducer or referred to an issue with a reproducer?
• [x] Have you tested your changes locally for CPU and GPU devices?
• [x] Have you made sure that new changes do not introduce compiler warnings?
• [ ] If this PR is a work in progress, are you filing the PR as a draft?

Updated gdb debugging reference documents as per the latest changes(line numbers and command outputs) after fixing gdb tests in tests/debugging. Closes: #573

[diptorupd]

@roxx30198 can you update the PR description a bit to state what are the changes you did and why they were needed?

[ZzEeKkAa]

Blocked by https://github.com/IntelPython/numba-dpex/pull/1224