fix expected pytest output for pytest integration after pinning to 3.…

…0.7 (#7240)

I also hastily merged #7226, which introduced another test failure, which I have fixed. These are the only failing tests, and these all now pass locally on my laptop.

- Fix expected pytest output in pytest runner testing.

I think it's still a good idea to string match pytest output unless we suddenly have to change pytest versions drastically like this again.

tests/python/pants_test/rules/test_test_integration.py

@@ -74,7 +74,7 @@ def test_passing_python_test(self):
 plugins: SOME_TEXT
 collected 1 items
 
-testprojects/tests/python/pants/dummies/test_pass.py .                   [100%]
+testprojects/tests/python/pants/dummies/test_pass.py .
 
 =========================== 1 passed in SOME_TEXT ===========================
 
@@ -94,7 +94,7 @@ def test_failing_python_test(self):
 plugins: SOME_TEXT
 collected 1 items
 
-testprojects/tests/python/pants/dummies/test_fail.py F                   [100%]
+testprojects/tests/python/pants/dummies/test_fail.py F
 
 =================================== FAILURES ===================================
 __________________________________ test_fail ___________________________________
@@ -122,7 +122,7 @@ def test_source_dep(self):
 plugins: SOME_TEXT
 collected 1 items
 
-testprojects/tests/python/pants/dummies/test_with_source_dep.py .        [100%]
+testprojects/tests/python/pants/dummies/test_with_source_dep.py .
 
 =========================== 1 passed in SOME_TEXT ===========================
 
@@ -141,7 +141,7 @@ def test_thirdparty_dep(self):
 plugins: SOME_TEXT
 collected 1 items
 
-testprojects/tests/python/pants/dummies/test_with_thirdparty_dep.py .    [100%]
+testprojects/tests/python/pants/dummies/test_with_thirdparty_dep.py .
 
 =========================== 1 passed in SOME_TEXT ===========================
 
@@ -162,7 +162,7 @@ def test_mixed_python_tests(self):
 plugins: SOME_TEXT
 collected 1 items
 
-testprojects/tests/python/pants/dummies/test_fail.py F                   [100%]
+testprojects/tests/python/pants/dummies/test_fail.py F
 
 =================================== FAILURES ===================================
 __________________________________ test_fail ___________________________________
@@ -179,7 +179,7 @@ def test_fail():
 plugins: SOME_TEXT
 collected 1 items
 
-testprojects/tests/python/pants/dummies/test_pass.py .                   [100%]
+testprojects/tests/python/pants/dummies/test_pass.py .
 
 =========================== 1 passed in SOME_TEXT ===========================