Update the CODEOWNERS file to use @apple/swift5-branch-managers (#63425)

Author: shahmishal

.github/CODEOWNERS

@@ -1,44 +1,2 @@
-# Lines starting with '#' are comments.
-# Each line is a file pattern followed by one or more owners.
-# Order is important. The last matching pattern has the most precedence.
-
-# Owners of ASTGen
-lib/ASTGen @zoecarver @CodaFi
-
-# Dependency scanning
-include/swift/DependencyScan                 @artemcm
-lib/AST/ModuleLoader.cpp                     @artemcm
-lib/DependencyScan                           @artemcm
-lib/Frontend/ModuleInterfaceLoader.cpp       @artemcm
-lib/Serialization/SerializedModuleLoader.cpp @artemcm
-test/ScanDependencies                        @artemcm
-
-# Driver
-include/swift/Driver @artemcm
-lib/Driver           @artemcm
-test/Driver          @artemcm
-
-# Owners of the parser
-include/swift/Parse @ahoppen @bnbarham @CodaFi @DougGregor @rintaro
-lib/Parse           @ahoppen @bnbarham @CodaFi @DougGregor @rintaro
-test/Parse          @ahoppen @bnbarham @CodaFi @DougGregor @rintaro
-
-SwiftCompilerSources @eeckstein
-
-# C++ Interop
-include/swift/ClangImporter @zoecarver @hyp @egorzhdan
-include/swift/PrintAsClang  @zoecarver @hyp @egorzhdan
-lib/ClangImporter           @zoecarver @hyp @egorzhdan
-lib/PrintAsClang            @zoecarver @hyp @egorzhdan
-stdlib/public/Cxx           @zoecarver @hyp @egorzhdan
-test/Interop                @zoecarver @hyp @egorzhdan
-
-# Threading implementation
-include/swift/Threading @al45tair
-lib/Threading           @al45tair
-
-# Windows support
-cmake/**/*Windows*    @compnerd
-lib/Basic/Windows     @compnerd
-stdlib/public/Windows @compnerd
-utils/*windows*       @compnerd
+# For the release branch @apple/swift5-branch-managers needs to approve the changes
+* @apple/swift5-branch-managers