Revert "[GR-29714] CI: Increase timeouts on macOS"

* This reverts commit 63d8c0b.
* It should run fine in 1h35min again.

Author: eregon

ci.jsonnet

@@ -496,8 +496,8 @@ local composition_environment = utils.add_inclusion_tracking(part_definitions, "
       // Order: platform, jdk, mx_env. Keep aligned for an easy visual comparison.
       "ruby-test-specs-linux-8":     $.platform.linux  + $.jdk.v8  + $.env.jvm + gate_no_build + $.use.build_no_clean + $.run.test_unit_tck + native_config + $.run.clean + $.run.test_specs + { timelimit: "50:00" },
       "ruby-test-specs-linux-11":    $.platform.linux  + $.jdk.v11 + $.env.jvm + gate_no_build + $.use.build_no_clean + $.run.test_unit_tck + native_config + $.run.clean + $.run.test_specs + { timelimit: "50:00" },
-      "ruby-test-specs-darwin-8":    $.platform.darwin + $.jdk.v8  + $.env.jvm + gate_no_build + $.use.build_no_clean + $.run.test_unit_tck + native_config + $.run.clean + $.run.test_specs + { timelimit: "02:00:00" },
-      "ruby-test-specs-darwin-11":   $.platform.darwin + $.jdk.v11 + $.env.jvm + gate_no_build + $.use.build_no_clean + $.run.test_unit_tck + native_config + $.run.clean + $.run.test_specs + { timelimit: "02:00:00" },
+      "ruby-test-specs-darwin-8":    $.platform.darwin + $.jdk.v8  + $.env.jvm + gate_no_build + $.use.build_no_clean + $.run.test_unit_tck + native_config + $.run.clean + $.run.test_specs + { timelimit: "01:35:00" },
+      "ruby-test-specs-darwin-11":   $.platform.darwin + $.jdk.v11 + $.env.jvm + gate_no_build + $.use.build_no_clean + $.run.test_unit_tck + native_config + $.run.clean + $.run.test_specs + { timelimit: "01:35:00" },
       "ruby-test-fast-linux-arm64":  $.platform.linux_arm64 + $.jdk.v11 + $.env.jvm + gate + $.run.test_fast + native_config + { timelimit: "30:00" },
       "ruby-test-fast-linux":        $.platform.linux  + $.jdk.v11 + $.env.jvm + gate + $.run.test_fast + { timelimit: "30:00" },  # To catch missing slow tags
       "ruby-test-mri-linux":         $.platform.linux  + $.jdk.v11 + $.env.jvm + gate + $.run.test_mri + { timelimit: "45:00" },