Replace wasm engine with walrus #1986

Job	Run time
build-on-macos	5m 55s
build-test-api	6m 43s
build-by-clang	6m 34s
build-on-windows-x64-uwp-x86-shared	8m 26s
build-test-codecache	11m 49s
build-test-debugger	4m 52s
build-test-on-x64-release (new-es octane v8)	8m 46s
build-test-on-x64-release (new-es octane v8, -DESCARGOT_THREADING=ON -DESCARGOT_TCO=ON)	8m 11s
build-test-on-x64-release (chakracore spidermonkey)	8m 7s
build-test-on-x64-release (chakracore spidermonkey, -DESCARGOT_THREADING=ON -DESCARGOT_TCO=ON)	8m 18s
build-test-on-x64-release (chakracore spidermonkey, -DESCARGOT_SMALL_CONFIG=ON -DESCARGOT_USE_CUS...	9m 2s
build-test-on-android (x86, 28)	26m 45s
build-test-on-android (x86_64, 28)	27m 1s
build-test-on-x86-release (octane)	8m 46s
build-test-on-x86-release (v8 chakracore spidermonkey)	9m 58s
build-test-on-x86-release (jetstream-only-simple-parallel-1)	12m 38s
build-test-on-x86-release (jetstream-only-simple-parallel-2 jsc-stress)	8m 46s
build-test-on-x86-release (jetstream-only-simple-parallel-3 jetstream-only-cdjs)	9m 26s
build-test-on-x86-x64-debug	6m 25s
build-test-wasmjs	7m 49s
test-on-windows-clang-cl (x86, -m32)	26m 5s
check-tidy	1m 17s
test-on-windows-x86-x64 (x86)	43m 58s
test-on-windows-x86-x64 (x64)	44m 26s
	5h 20m 3s

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