refactor(ivy): evaluate map-based styling bindings with a new algorithm (#30543)

This patch in the second runtime change which refactors how styling
bindings work in Angular. This patch refactors how map-based
`[style]` and `[class]` bindings work using a new algorithm which
is faster and less complex than the former one.

This patch is a follow-up to an earlier refactor which enabled
support for prop-based `[style.name]` and `[class.name]`
bindings (see f03475cac8).

PR Close #30543

packages/compiler/src/render3/view/styling_builder.ts

@@ -364,6 +364,11 @@ export class StylingBuilder {
   private _buildMapBasedInstruction(
       valueConverter: ValueConverter, isClassBased: boolean, stylingInput: BoundStylingEntry) {
     let totalBindingSlotsRequired = 0;
+    if (compilerIsNewStylingInUse()) {
+      // the old implementation does not reserve slot values for
+      // binding entries. The new one does.
+      totalBindingSlotsRequired++;
+    }
 
     // these values must be outside of the update block so that they can
     // be evaluated (the AST visit call) during creation time so that any