Fix build + skip new flaky tests

# Conflicts:
#	unofficial.gni

Author: victorgomes

deps/sqlite/unofficial.gni

@@ -36,13 +36,6 @@ template("sqlite_gn_build") {
         "-Wno-unused-function",
         "-Wno-unused-variable",
       ]
-    } else {
-      cflags_c = [
-        "-Wno-implicit-fallthrough",
-        "-Wno-unreachable-code",
-        "-Wno-unreachable-code-break",
-        "-Wno-unreachable-code-return",
-      ]
     }
   }
 }

test/parallel/parallel.status

@@ -39,6 +39,9 @@ test-repl-mode: SKIP
 test-repl: SKIP
 # Temporarily disabled to land https://crrev.com/c/4507375
 test-fs-write: SKIP
+# Skip new flaky tests:
+test-without-async-context-frame: SKIP
+test-repl-preview-timeout: SKIP
 
 # https://github.com/nodejs/node/issues/51862
 test-fs-read-stream-concurrent-reads: PASS, FLAKY