Add ".venv" to gitignore file

Signed-off-by: David Galiffi <David.Galiffi@amd.com>


[ROCm/rocprofiler-compute commit: c24baf3610]

projects/rocprofiler-compute/.gitignore

@@ -10,6 +10,7 @@ __pycache__
 /build*
 /.vscode
 /.cache
+/.venv
 /workloads
 .coverage
 saved_analysis
@@ -17,4 +18,4 @@ pmc_kernel_top.csv
 VERSION.sha
 
 # temp files
-/tests/Testing
+/tests/Testing