fix: Fully transpile in Mocha tests to correctly inline const enums (#594)

It seems transpile-only transpiles per module, however we need to
perform full "compilation" in order to correctly see and inline values
for const enums.

We use const enums because that's how they are emitted by napi-rs and
there's no option to change that. Rather than invest into supporting
that or working around it, let's just fully compile the test harness
once.

See https://www.typescriptlang.org/tsconfig/#isolatedModules for more
context.

Author: Xanewok

hardhat-tests/.mocharc.json

@@ -1,5 +1,5 @@
 {
-  "require": "ts-node/register/transpile-only",
+  "require": "ts-node/register",
   "file": "./test/setup.ts",
   "exclude": [
     "test/fixture-projects/**/*.ts",

hardhat-tests/test/internal/hardhat-network/stack-traces/test.ts

@@ -281,15 +281,9 @@ function compareStackTraces(
 
   // if IR is enabled, we ignore callstack entries in the comparison
   if (isViaIR) {
-    trace = trace.filter((frame) => {
-      // FIXME: For some reason, the const enum from napi-rs is not picked up by TS
-      // and we get undefined instead of the actual value. Just use the number.
-      // eslint-disable-next-line @typescript-eslint/naming-convention
-      function assertCallstackEntry<_T extends 0>() {}
-      assertCallstackEntry<StackTraceEntryType.CALLSTACK_ENTRY>();
-
-      return frame.type !== 0;
-    });
+    trace = trace.filter(
+      (frame) => frame.type !== StackTraceEntryType.CALLSTACK_ENTRY
+    );
     description = description.filter(
       (frame) => frame.type !== "CALLSTACK_ENTRY"
     );