Add manylinux2014 artifacts

tools/run_tests/artifacts/artifact_targets.py

@@ -350,8 +350,20 @@ def targets():
         CSharpExtArtifact('linux', 'android', arch_abi='armeabi-v7a'),
         CSharpExtArtifact('linux', 'android', arch_abi='x86'),
         CSharpExtArtifact('macos', 'ios'),
-        # TODO(https://github.com/grpc/grpc/issues/20283)
-        # Add manylinux2010_x86 targets once this issue is resolved.
+        PythonArtifact('manylinux2014', 'x64', 'cp35-cp35m'),
+        PythonArtifact('manylinux2014', 'x64', 'cp36-cp36m'),
+        PythonArtifact('manylinux2014', 'x64', 'cp37-cp37m'),
+        PythonArtifact('manylinux2014', 'x64', 'cp38-cp38'),
+        PythonArtifact('manylinux2014', 'x86', 'cp35-cp35m'),
+        PythonArtifact('manylinux2014', 'x86', 'cp36-cp36m'),
+        PythonArtifact('manylinux2014', 'x86', 'cp37-cp37m'),
+        PythonArtifact('manylinux2014', 'x86', 'cp38-cp38'),
+        PythonArtifact('manylinux2010', 'x64', 'cp27-cp27m'),
+        PythonArtifact('manylinux2010', 'x64', 'cp27-cp27mu'),
+        PythonArtifact('manylinux2010', 'x64', 'cp35-cp35m'),
+        PythonArtifact('manylinux2010', 'x64', 'cp36-cp36m'),
+        PythonArtifact('manylinux2010', 'x64', 'cp37-cp37m'),
+        PythonArtifact('manylinux2010', 'x64', 'cp38-cp38'),
         PythonArtifact('manylinux2010', 'x86', 'cp27-cp27m'),
         PythonArtifact('manylinux2010', 'x86', 'cp27-cp27mu'),
         PythonArtifact('manylinux2010', 'x86', 'cp35-cp35m'),
@@ -364,12 +376,6 @@ def targets():
         PythonArtifact('linux_extra', 'armv6', '2.7'),
         PythonArtifact('linux_extra', 'armv6', '3.5'),
         PythonArtifact('linux_extra', 'armv6', '3.6'),
-        PythonArtifact('manylinux2010', 'x64', 'cp27-cp27m'),
-        PythonArtifact('manylinux2010', 'x64', 'cp27-cp27mu'),
-        PythonArtifact('manylinux2010', 'x64', 'cp35-cp35m'),
-        PythonArtifact('manylinux2010', 'x64', 'cp36-cp36m'),
-        PythonArtifact('manylinux2010', 'x64', 'cp37-cp37m'),
-        PythonArtifact('manylinux2010', 'x64', 'cp38-cp38'),
         PythonArtifact('macos', 'x64', 'python2.7'),
         PythonArtifact('macos', 'x64', 'python3.5'),
         PythonArtifact('macos', 'x64', 'python3.6'),