Replace wasm engine with walrus #1950

Job	Run time
build-on-macos	4m 35s
build-test-on-android (x86, 28)	26m 5s
build-test-on-android (x86_64, 28)	24m 28s
test-on-windows-clang-cl (x86, -m32)	10m 36s
build-by-clang	5m 50s
check-tidy	1m 20s
build-test-on-x86-release (octane)	10m 10s
build-test-on-x86-release (v8 chakracore spidermonkey)	9m 40s
build-test-on-x86-release (jetstream-only-simple-parallel-1)	11m 39s
build-test-on-x86-release (jetstream-only-simple-parallel-2 jsc-stress)	9m 11s
build-test-on-x86-release (jetstream-only-simple-parallel-3 jetstream-only-cdjs)	7m 44s
build-on-windows-x64-uwp-x86-shared	12m 24s
test-on-windows-x86-x64 (x86)	42m 34s
test-on-windows-x86-x64 (x64)	41m 47s
build-test-api	5m 56s
build-test-codecache	8m 17s
build-test-debugger	4m 24s
build-test-on-x64-release (new-es octane v8)	10m 0s
build-test-on-x64-release (new-es octane v8, -DESCARGOT_THREADING=ON -DESCARGOT_TCO=ON)	10m 0s
build-test-on-x64-release (chakracore spidermonkey)	9m 46s
build-test-on-x64-release (chakracore spidermonkey, -DESCARGOT_THREADING=ON -DESCARGOT_TCO=ON)	8m 15s
build-test-on-x64-release (chakracore spidermonkey, -DESCARGOT_SMALL_CONFIG=ON -DESCARGOT_USE_CUS...	10m 5s
build-test-on-x86-x64-debug	6m 4s
build-test-wasmjs	8m 22s
	4h 59m 12s

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