PY-46381 Don't suggest internal parts of third-party packages to user

Namely, their bundled dependencies and tests.

Common names of test and "vendored" roots were collected based on
a base Anaconda interpreter.

Filtration is done over a module/package qualified name in its closest root,
sharing some parts of the implementation with QualifiedNameFinder.
It's likely to also be utilized in the upcoming auto-importing completion
of qualified names.

To make the customization of a search scope easier to use and extend in
the future, I introduced PySearchScopeBuilder API that allows to build
a custom search scope, excluding some irrelevant parts of a Python SDK.

I also updated the set of known standard library tests.
"idlelib/testcode.py" was removed as the only file entry that is
found only in Python 3.3, which we no longer support.

GitOrigin-RevId: 6676c59011d51371639ce24a5ac5c5b56d6b13fb

python/testData/completion/className/thirdPartyPackageBundledDependenciesNotSuggested/site-packages/pip/_vendor/requests/__init__.py

@@ -0,0 +1,2 @@
+def request():
+    pass

python/testData/completion/className/thirdPartyPackageBundledDependenciesNotSuggested/site-packages/requests/__init__.py

@@ -0,0 +1,2 @@
+def request():
+    pass

python/testData/completion/className/thirdPartyPackageBundledDependenciesNotSuggested/src/main.py

@@ -0,0 +1 @@
+request<caret>

python/testData/completion/className/thirdPartyPackageTestsNotSuggested/site-packages/mypkg/mod.py

@@ -0,0 +1,2 @@
+def func():
+    pass

python/testData/completion/className/thirdPartyPackageTestsNotSuggested/site-packages/mypkg/test/test_mod.py

@@ -0,0 +1,2 @@
+def test_func():
+    pass

python/testData/completion/className/thirdPartyPackageTestsNotSuggested/src/main.py

@@ -0,0 +1 @@
+fun<caret>

python/testData/completion/className/thirdPartyPackageTestsNotSuggested/src/mod.py

@@ -0,0 +1,2 @@
+def func():
+    pass

python/testData/completion/className/thirdPartyPackageTestsNotSuggested/src/tests.py

@@ -0,0 +1,2 @@
+def test_func():
+    pass