Merge pull request #18956 from jtattermusch/job_split_followup

Job split followup: increase timeout for macos and windows C/C++ jobs

tools/internal_ci/macos/grpc_basictests_c_cpp.cfg

@@ -17,7 +17,7 @@
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/macos/grpc_run_tests_matrix.sh"
 gfile_resources: "/bigstore/grpc-testing-secrets/gcp_credentials/GrpcTesting-d0eeee2db331.json"
-timeout_mins: 60
+timeout_mins: 120
 action {
   define_artifacts {
     regex: "**/*sponge_log.*"

tools/internal_ci/windows/grpc_basictests_c.cfg

@@ -16,7 +16,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/windows/grpc_run_tests_matrix.bat"
-timeout_mins: 60
+timeout_mins: 120
 action {
   define_artifacts {
     regex: "**/*sponge_log.*"