Bug#37032975: MLE: WebAssembly is not supported

  - ticket HCS-13821 Add WebAssembly in MLE
  - allows Polyglot access; might need approval
  - adds WASM language (similar to Python and Ruby)
  - JS context now also includes WASM in the same
    context
  - changed virtual FileSystem to be charset-agnostic
    (it was UTF8 only) because WASM is binary
  - added MTR that tests a WASM file
    - it reads a local half-hard-coded WASM
      file with help of debug_sync

Change-Id: Icbd7e4f39600fb7351ce7bf2f22389b637897c0c

Author: Igor Pesic

mysql-test/include/excludenoskip.list

@@ -314,6 +314,7 @@ not_tlsv13.inc
 # language component which is not supported for now
 have_python.inc
 have_ruby.inc
+have_wasm.inc
 
 # 33. Skip tests on platforms that don't support the FIDO plugins
 have_fido_plugin.inc