Create CODEOWNERS

Also added code owners for static linking tests.

Author: MaxDesiatov

.github/CODEOWNERS

@@ -0,0 +1,9 @@
+# Lines starting with '#' are comments.
+# Each line is a case-sensitive file pattern followed by one or more owners.
+# Order is important. The last matching pattern has the most precedence.
+# More information: https://docs.github.com/en/articles/about-code-owners
+#
+# Please mirror the repository's file hierarchy in case-sensitive lexicographic
+# order.
+
+/test-static* @MaxDesiatov @etcwilde