Add Kirill Podoprigora for AST codeowners (#124302)

Author: Eclips4

.github/CODEOWNERS

@@ -38,7 +38,6 @@ Python/compile.c              @markshannon @iritkatriel
 Python/assemble.c             @markshannon @iritkatriel
 Python/flowgraph.c            @markshannon @iritkatriel
 Python/instruction_sequence.c @iritkatriel
-Python/ast_opt.c              @isidentical
 Python/bytecodes.c            @markshannon
 Python/optimizer*.c           @markshannon
 Python/optimizer_analysis.c   @Fidget-Spinner
@@ -158,10 +157,12 @@ Include/internal/pycore_time.h  @pganssle @abalkin
 /Tools/cases_generator/        @markshannon
 
 # AST
-Python/ast.c                  @isidentical @JelleZijlstra
-Parser/asdl.py                @isidentical @JelleZijlstra
-Parser/asdl_c.py              @isidentical @JelleZijlstra
-Lib/ast.py                    @isidentical @JelleZijlstra
+Python/ast.c                  @isidentical @JelleZijlstra @eclips4
+Python/ast_opt.c              @isidentical @eclips4
+Parser/asdl.py                @isidentical @JelleZijlstra @eclips4
+Parser/asdl_c.py              @isidentical @JelleZijlstra @eclips4
+Lib/ast.py                    @isidentical @JelleZijlstra @eclips4
+Lib/test/test_ast/            @eclips4
 
 # Mock
 /Lib/unittest/mock.py         @cjw296