PYCBC-1438: Update Python 4.x Test Framework

Motivation
==========
In order to provide more stability to the CI/CD pipeline the test
framework should be reworked to not rely on creating a connection for
each test suite.  The unneccesary number of connections can create
instability.

Modification
============
Reworked the test framework to have a global connection that can be
reused.  Only specific tests or test suites that need a new connection
create a connection now.  Creating of docs and removing has also been
updated so as to allow for bulk insert/removal further reducing the time
for tests to complete.

Results
=======
All tests pass.

Change-Id: I9f449b65bbcbe060699adfb7a0082e9f34ff3b13
Reviewed-on: https://review.couchbase.org/c/couchbase-python-client/+/186267
Tested-by: Build Bot <build@couchbase.com>
Reviewed-by: David Kelly <davidmichaelkelly@gmail.com>

Author: thejcfactor

.pre-commit-config.yaml

@@ -69,6 +69,7 @@ repos:
               txcouchbase/tests/|
               couchbase/tests/|
               tests/mock_server.py|
+              tests/environments/|
               simple_acouchbase.py|
               simple_couchbase.py|
               simple_txcouchbase.py|

conftest.py

@@ -16,7 +16,9 @@
 import pytest
 
 pytest_plugins = [
-    "tests.helpers"
+    # "tests.helpers"
+    'tests.couchbase_config',
+    'tests.environments.test_environment'
 ]
 
 _DIAGNOSTIC_TESTS = [