Fix --test for d8 shell runner

There seems to be two bugs when running
`d8 cli.js -- --test <subset>`:

1. A typo in cli.js (`cliParams.get("tests")` should've been
  `cliParams.get("test")`) which leads to

  ```
  cli.js:122: TypeError: Cannot read properties of undefined (reading 'split')
      let tests = cliParams.has("test") ? cliParams.get("tests").split(",") : []
                                                              ^
  TypeError: Cannot read properties of undefined (reading 'split')
      at cli.js:122:63
  ```
2. performance.mark/performance.measure in d8 requires PerformanceMark
  objects as arguments and do not take mark name strings.

  ```
  ./JetStreamDriver.js:3233: Error: Couldn't find benchmark named "true"
        throw new Error(`Couldn't find benchmark named "${name}"`);
        ^
  Error: Couldn't find benchmark named "true"
      at findBenchmarkByName (./JetStreamDriver.js:3233:15)
      at processTestList (./JetStreamDriver.js:3223:29)
      at ./JetStreamDriver.js:3261:18
     at cli.js:143:1

  cli.js:143: Error: Error executing file: "./JetStreamDriver.js"
  load("./JetStreamDriver.js");
  ^
  Error: Error executing file: "./JetStreamDriver.js"
      at cli.js:143:1
  ```

This patch fixes the typo in 1. For 2, since these are only used for
UI annotations, replace them with no-ops in d8 instead.

Author: joyeecheung

cli.js

@@ -119,7 +119,7 @@ const printHelp = cliParams.delete("help");
 const dumpTestList = cliParams.delete("dumpTestList");
 
 if (cliArgs.length) {
-    let tests = cliParams.has("test") ? cliParams.get("tests").split(",") : []
+    let tests = cliParams.has("test") ? cliParams.get("test").split(",") : []
     tests = tests.concat(cliArgs);
     cliParams.set("test", tests.join(","));
 }

utils/shell-config.js

@@ -55,3 +55,8 @@ if (typeof performance == "undefined")
 
 performance.mark ??= function(){};
 performance.measure ??= function(){};
+
+if (isD8) {
+    performance.mark = function(){};
+    performance.measure = function(){};
+}