[PlayStation] Replace OSAllocator implementation with memory-extra private library

[basuke]

https://bugs.webkit.org/show_bug.cgi?id=274221

Reviewed by NOBODY (OOPS!).

To reserve large address space, our platform requires precise control of virtual address space and commiti/decommit management is not enough for this purpose. In this patch, I've introduced new memory-extra private library for that purpose and add platform specific OSAllocator implementation.

Also replace showmap library with embedded one inside memory-extra and use clever way to collect memory information.

• Source/JavaScriptCore/PlatformPlayStation.cmake:
• Source/JavaScriptCore/shell/PlatformPlayStation.cmake:
• Source/JavaScriptCore/testmem/PlatformPlayStation.cmake:
• Source/JavaScriptCore/testmem/testmem.cpp: (Footprint::now):
• Source/WTF/wtf/PlatformPlayStation.cmake:
• Source/WTF/wtf/playstation/OSAllocatorPlayStation.cpp: Added. (WTF::OSAllocator::tryReserveAndCommit): (WTF::OSAllocator::tryReserveUncommitted): (WTF::OSAllocator::reserveUncommitted): (WTF::OSAllocator::tryReserveUncommittedAligned): (WTF::OSAllocator::reserveAndCommit): (WTF::OSAllocator::commit): (WTF::OSAllocator::decommit): (WTF::OSAllocator::hintMemoryNotNeededSoon): (WTF::OSAllocator::releaseDecommitted): (WTF::OSAllocator::protect):
• Source/WebCore/PlatformPlayStation.cmake:
• Source/WebCore/page/playstation/ResourceUsageThreadPlayStation.cpp: (WebCore::ResourceUsageThread::platformCollectMemoryData):
• Source/cmake/OptionsPlayStation.cmake:
• Tools/TestWebKitAPI/PlatformPlayStation.cmake:

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Reviewed by NOBODY (OOPS!).

Explanation of why this fixes the bug (OOPS!).

* path/changed.ext:
(function):
(class.function):

https://github.com/WebKit/WebKit/commit/75876b0080c4b213202ecae59c79d9582fd5fc5f

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	⏳ 🛠 wpe-skia
✅ 🛠 🧪 jsc	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
	✅ 🛠 watch		✅ 🛠 jsc-armv7
	✅ 🛠 watch-sim		✅ 🧪 jsc-armv7-tests

[webkit-early-warning-system]

EWS run on current version of this PR (hash https://github.com/WebKit/WebKit/commit/75876b0080c4b213202ecae59c79d9582fd5fc5f)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	⏳ 🛠 wpe-skia
✅ 🛠 🧪 jsc	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🛠 watch		✅ 🛠 jsc-armv7
	✅ 🛠 watch-sim		✅ 🧪 jsc-armv7-tests

[webkit-commit-queue]

Committed 278920@main (3042eb64bb03): https://commits.webkit.org/278920@main

Reviewed commits have been landed. Closing PR #28603 and removing active labels.