Normative: Add Import Attributes proposal (#3057)

* Add Import Attributes proposal
* `npm run format`
* Updates from review
* Changes from review
* Do not re-define ImportDeclaration
* Add `assert` deprecated syntax to `export ... from`
* Remove `[no LineTerminator here]` before `with`
* Use optional symbols to reduce grammar
* Update ImportEntries and ExportEntry to use ModuleRequest Records
* Review from Michael
* Replace AttributeKey with LiteralPropertyName
* Separate ModuleRequest and LoadedModuleRequest fields
* Validate attrs when lodaing deps and not when parsing
* Merge `AssertClause` into `WithClause`, and fix missing SDOs
* Fix type annotation
* Simplify AttributesKeyword
* Reviews
* Review
* Remove support for float and bigint literal keys
* Update wording

Author: nicolo-ribaudo

esmeta-ignore.json

@@ -4,9 +4,14 @@
   "ClassStaticBlockBody[0,0].EvaluateClassStaticBlockBody",
   "CompareTypedArrayElements",
   "DoWait",
+  "EvaluateImportCall",
+  "FinishLoadingImportedModule",
   "FunctionBody[0,0].EvaluateFunctionBody",
   "GetViewByteLength",
   "INTRINSICS.Atomics.notify",
   "Record[SourceTextModuleRecord].ExecuteModule",
+  "Record[SourceTextModuleRecord].GetExportedNames",
+  "Record[SourceTextModuleRecord].InitializeEnvironment",
+  "Record[SourceTextModuleRecord].ResolveExport",
   "TypedArrayLength"
 ]