Support -vv for more verbose test output

[bryevdv]

Requested by @fduguet-nv This PR adds support for a -vv option to test.py. When -vv is sprecified, the pytest -s option is added to the individual test file invocations that the test.py test runner launches. This will cause the stdout output, which is normally suppressed on passing tests, to be displayed unconditionally.

It is recommended that this option be used in conjunction with the --files argument, in order to obtain more manageable output. Here is an example of such usage:

dev38 ❯ ./test.py --use=cuda,cpus,eager -vv --files tests/integration/test_binary_op_broadcast.py                         

############################################################
### 
### Test Suite Configuration
### 
### * Feature stages       : cpus, cuda, eager
### * Test files per stage : 1
### 
############################################################

############################################################
### Entering stage: CPU (with 1 worker)
############################################################

[PASS] (CPU) tests/integration/test_binary_op_broadcast.py
   ============================= test session starts ==============================
   platform linux -- Python 3.8.13, pytest-7.1.2, pluggy-1.0.0 -- /home/bryan/anaconda3/envs/dev38/bin/python3
   cachedir: .pytest_cache
   rootdir: /home/bryan/work/cunumeric, configfile: pyproject.toml
   plugins: cov-3.0.0, mock-3.8.1
   collecting ... collected 4 items
   
   tests/integration/test_binary_op_broadcast.py::test_random[2-(20, 21, 22)]   (20, 21) x (21,)
     (20, 21) x (1, 21)
     (20, 21) x (20, 1)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[2-(1, 21, 22)]   (1, 21) x (21,)
     (1, 21) x (1, 21)
     (1, 21) x (1, 1)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[3-(20, 21, 22)]   (20, 21, 22) x (22,)
     (20, 21, 22) x (21, 22)
     (20, 21, 22) x (1, 21, 22)
     (20, 21, 22) x (20, 1, 22)
     (20, 21, 22) x (20, 21, 1)
     (20, 21, 22) x (20, 1, 1)
     (20, 21, 22) x (1, 21, 1)
     (20, 21, 22) x (1, 1, 22)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[3-(1, 21, 22)]   (1, 21, 22) x (22,)
     (1, 21, 22) x (21, 22)
     (1, 21, 22) x (1, 21, 22)
     (1, 21, 22) x (1, 1, 22)
     (1, 21, 22) x (1, 21, 1)
     (1, 21, 22) x (1, 1, 1)
     (1, 21, 22) x (1, 21, 1)
     (1, 21, 22) x (1, 1, 22)
   PASSED
   
   ============================== 4 passed in 0.43s ===============================
   [0 - 7fd3894ec000]    0.000084 {4}{threads}: reservation ('CPU proc 1d00000000000004') cannot be satisfied
   
                           CPU: Passed 1 of 1 tests (100.0%)

############################################################
### 
### Exiting state: CPU
### 
### * Results      : 1 / 1 files passed (100.0%)
### * Elapsed time : 0:00:01.831223
### 
############################################################

############################################################
### Entering stage: GPU (with 7 workers)
############################################################

[PASS] (GPU) tests/integration/test_binary_op_broadcast.py
   ============================= test session starts ==============================
   platform linux -- Python 3.8.13, pytest-7.1.2, pluggy-1.0.0 -- /home/bryan/anaconda3/envs/dev38/bin/python3
   cachedir: .pytest_cache
   rootdir: /home/bryan/work/cunumeric, configfile: pyproject.toml
   plugins: cov-3.0.0, mock-3.8.1
   collecting ... collected 4 items
   
   tests/integration/test_binary_op_broadcast.py::test_random[2-(20, 21, 22)]   (20, 21) x (21,)
     (20, 21) x (1, 21)
     (20, 21) x (20, 1)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[2-(1, 21, 22)]   (1, 21) x (21,)
     (1, 21) x (1, 21)
     (1, 21) x (1, 1)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[3-(20, 21, 22)]   (20, 21, 22) x (22,)
     (20, 21, 22) x (21, 22)
     (20, 21, 22) x (1, 21, 22)
     (20, 21, 22) x (20, 1, 22)
     (20, 21, 22) x (20, 21, 1)
     (20, 21, 22) x (20, 1, 1)
     (20, 21, 22) x (1, 21, 1)
     (20, 21, 22) x (1, 1, 22)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[3-(1, 21, 22)]   (1, 21, 22) x (22,)
     (1, 21, 22) x (21, 22)
     (1, 21, 22) x (1, 21, 22)
     (1, 21, 22) x (1, 1, 22)
     (1, 21, 22) x (1, 21, 1)
     (1, 21, 22) x (1, 1, 1)
     (1, 21, 22) x (1, 21, 1)
     (1, 21, 22) x (1, 1, 22)
   PASSED
   
   ============================== 4 passed in 0.67s ===============================
   [0 - 7f941e08d000]    0.000098 {4}{threads}: reservation ('CPU proc 1d00000000000003') cannot be satisfied
   
                           GPU: Passed 1 of 1 tests (100.0%)

############################################################
### 
### Exiting state: GPU
### 
### * Results      : 1 / 1 files passed (100.0%)
### * Elapsed time : 0:00:02.297075
### 
############################################################

############################################################
### Entering stage: Eager (with 1 worker)
############################################################

[PASS] (Eager) tests/integration/test_binary_op_broadcast.py
   ============================= test session starts ==============================
   platform linux -- Python 3.8.13, pytest-7.1.2, pluggy-1.0.0 -- /home/bryan/anaconda3/envs/dev38/bin/python3
   cachedir: .pytest_cache
   rootdir: /home/bryan/work/cunumeric, configfile: pyproject.toml
   plugins: cov-3.0.0, mock-3.8.1
   collecting ... collected 4 items
   
   tests/integration/test_binary_op_broadcast.py::test_random[2-(20, 21, 22)]   (20, 21) x (21,)
     (20, 21) x (1, 21)
     (20, 21) x (20, 1)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[2-(1, 21, 22)]   (1, 21) x (21,)
     (1, 21) x (1, 21)
     (1, 21) x (1, 1)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[3-(20, 21, 22)]   (20, 21, 22) x (22,)
     (20, 21, 22) x (21, 22)
     (20, 21, 22) x (1, 21, 22)
     (20, 21, 22) x (20, 1, 22)
     (20, 21, 22) x (20, 21, 1)
     (20, 21, 22) x (20, 1, 1)
     (20, 21, 22) x (1, 21, 1)
     (20, 21, 22) x (1, 1, 22)
   PASSED
   tests/integration/test_binary_op_broadcast.py::test_random[3-(1, 21, 22)]   (1, 21, 22) x (22,)
     (1, 21, 22) x (21, 22)
     (1, 21, 22) x (1, 21, 22)
     (1, 21, 22) x (1, 1, 22)
     (1, 21, 22) x (1, 21, 1)
     (1, 21, 22) x (1, 1, 1)
     (1, 21, 22) x (1, 21, 1)
     (1, 21, 22) x (1, 1, 22)
   PASSED
   
   ============================== 4 passed in 0.04s ===============================
   [0 - 7fb6a8ab5000]    0.000068 {4}{threads}: reservation ('CPU proc 1d00000000000002') cannot be satisfied
   
                         Eager: Passed 1 of 1 tests (100.0%)

############################################################
### 
### Exiting state: Eager
### 
### * Results      : 1 / 1 files passed (100.0%)
### * Elapsed time : 0:00:01.318096
### 
############################################################

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                     All tests: Passed 3 of 3 tests (100.0%)