ci: enable thin LTO on Mac (#33194) (#33387)

* build: remove thin lto mac patch

* build: remove step-get-more-space-on-mac

* build: remove USE_PREBUILT_V8_CONTEXT_SNAPSHOT

* ci: re-add mksnapshot logic

* ci: re-add USE_PREBUILT_V8_CONTEXT_SNAPSHOT

* ci: re-add get-more-space, delete thin LTO cache & .dSYM

* ci: don't delete v8_snapshot_generator.dSYM

* ci: add timeout to mksnapshot

Co-authored-by: Keeley Hammond <vertedinde@electronjs.org>

.circleci/build_config.yml

@@ -543,6 +543,7 @@ step-electron-build: &step-electron-build
         (cd out/Default; zip mksnapshot.zip mksnapshot_args clang_x64_v8_arm64/gen/v8/embedded.S)
         rm -rf out/Default/clang_x64_v8_arm64/gen
         rm -rf out/Default/clang_x64_v8_arm64/obj
+        rm -rf out/Default/clang_x64_v8_arm64/thinlto-cache
         rm -rf out/Default/clang_x64/obj
 
         # Regenerate because we just deleted some ninja files 
@@ -779,6 +780,7 @@ step-show-goma-stats: &step-show-goma-stats
 step-mksnapshot-build: &step-mksnapshot-build
   run:
     name: mksnapshot build
+    no_output_timeout: 30m
     command: |
       cd src
       if [ "$USE_PREBUILT_V8_CONTEXT_SNAPSHOT" != "1" ]; then

patches/chromium/.patches

@@ -112,6 +112,5 @@ feat_add_data_transfer_to_requestsingleinstancelock.patch
 fix_crash_when_saving_edited_pdf_files.patch
 port_autofill_colors_to_the_color_pipeline.patch
 build_disable_partition_alloc_on_mac.patch
-build_disable_thin_lto_on_mac.patch
 fix_non-client_mouse_tracking_and_message_bubbling_on_windows.patch
 remove_incorrect_width_height_adjustments.patch