Bug Fix - remove cp ptx file command in gpu burn test

[yukirora]

Description
remove cp ptx file in gpu burn test since the command is run inside self.args.bin_dir dir.

superbenchmark/superbench/benchmarks/micro_benchmarks/micro_base.py

Line 183 in d246bab

output = run_command(self._commands[cmd_idx], flush_output=self._args.log_flushing, cwd=self._args.bin_dir)

[abuccts]

Previously the working dir to run benchmarks is $SB_WORKSPACE, is it changed to bin for all benchmarks? will the behavior affect other benchmarks like ib traffic?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ce3737f) 86.96% compared to head (6c84d07) 86.96%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #567      +/-   ##
==========================================
- Coverage   86.96%   86.96%   -0.01%     
==========================================
  Files          93       93              
  Lines        6268     6266       -2     
==========================================
- Hits         5451     5449       -2     
  Misses        817      817              

Flag	Coverage Δ
cpu-python3.6-unit-test	71.85% <100.00%> (-0.01%)	⬇️
cpu-python3.7-unit-test	71.85% <100.00%> (-0.01%)	⬇️
cuda-unit-test	84.91% <100.00%> (-0.01%)	⬇️

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