Disable partition alloc on all platforms to prevent crashes

There are several cases we've encountered where allocs and frees don't
match the correct allocator when going from Electron to LibreOfficeKit,
causing crashes. Usually an allocaiton is preformed in LOK with the
system default allocator but then Electron tries to free it with the
partition allocator. This is already disabled on macOS by default so
disabling it for Windows and Linux doesn't really change much.

They only just re-enabled partition alloc on Mac last week anyway:
electron/electron#33981

src/electron/patches/chromium/build_disable_partition_alloc_on_mac.patch

@@ -1,13 +1,16 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: VerteDinde <vertedinde@electronjs.org>
 Date: Tue, 1 Mar 2022 12:07:25 -0800
-Subject: build: disable partition alloc on mac
+Subject: build: disable partition alloc
 
 Enabling partition alloc caused a crash when spawning
 a child process. This patch disables partition alloc for mac,
 and can be removed when the crash in fork is resolved.
 Related issue: https://github.com/electron/electron/issues/32718
 
+-- DISABLE ON ALL PLATFORMS --
+It doesn't play nicely with LOK
+
 diff --git a/base/allocator/allocator.gni b/base/allocator/allocator.gni
 index 97a57dfb1626ae9a781736dd8b0b55bf201162c1..5c97441faad781b459255cb1f7d0652ec86e40c8 100644
 --- a/base/allocator/allocator.gni
@@ -17,7 +20,7 @@ index 97a57dfb1626ae9a781736dd8b0b55bf201162c1..5c97441faad781b459255cb1f7d0652e
  # - NaCl: No plans to support it.
  # - iOS: not done yet.
 -_is_partition_alloc_platform = !is_nacl && !is_ios
-+_is_partition_alloc_platform = !is_nacl && !is_ios && !is_mac
++_is_partition_alloc_platform = false
 
  # Under Windows Debug the allocator shim is not compatible with CRT.
  #     NaCl in particular does seem to link some binaries statically