feat: introduce source maps for templates (#15011)

The main use case for the generated source maps is to give
errors a meaningful context in terms of the original source
that the user wrote.

Related changes that are included in this commit:

* renamed virtual folders used for jit:
  * ng://<module type>/module.ngfactory.js
  * ng://<module type>/<comp type>.ngfactory.js
  * ng://<module type>/<comp type>.html (for inline templates)
* error logging:
  * all errors that happen in templates are logged
    from the place of the nearest element.
  * instead of logging error messages and stacks separately,
    we log the actual error. This is needed so that browsers apply
    source maps to the stack correctly.
  * error type and error is logged as one log entry.

Note that long-stack-trace zone has a bug that 
disables source maps for stack traces,
see https://github.com/angular/zone.js/issues/661.

BREAKING CHANGE:

- DebugNode.source no more returns the source location of a node.  

Closes 14013

packages/core/src/view/view.ts

@@ -18,9 +18,7 @@ import {checkAndUpdateQuery, createQuery, queryDef} from './query';
 import {createTemplateData, createViewContainerData} from './refs';
 import {checkAndUpdateTextDynamic, checkAndUpdateTextInline, createText} from './text';
 import {ArgumentType, CheckType, ElementData, ElementDef, NodeData, NodeDef, NodeFlags, ProviderData, ProviderDef, RootData, Services, TextDef, ViewData, ViewDefinition, ViewDefinitionFactory, ViewFlags, ViewHandleEventFn, ViewState, ViewUpdateFn, asElementData, asProviderData, asPureExpressionData, asQueryList, asTextData} from './types';
-import {checkBindingNoChanges, isComponentView, resolveViewDefinition, viewParentEl} from './util';
-
-const NOOP = (): any => undefined;
+import {NOOP, checkBindingNoChanges, isComponentView, resolveViewDefinition, viewParentEl} from './util';
 
 export function viewDef(
     flags: ViewFlags, nodes: NodeDef[], updateDirectives?: ViewUpdateFn,
@@ -137,6 +135,8 @@ export function viewDef(
   const handleEvent: ViewHandleEventFn = (view, nodeIndex, eventName, event) =>
       nodes[nodeIndex].element.handleEvent(view, eventName, event);
   return {
+    // Will be filled later...
+    factory: undefined,
     nodeFlags: viewNodeFlags,
     rootNodeFlags: viewRootNodeFlags,
     nodeMatchedQueries: viewMatchedQueries, flags,