fix(ivy): don't run decorator handlers against declaration files (#34557)

Currently the decorator handlers are run against all `SourceFile`s in the compilation, but we shouldn't be doing it against declaration files. This initially came up as a CI issue in #33264 where it was worked around only for the `DirectiveDecoratorHandler`. These changes move the logic into the `TraitCompiler` and `DecorationAnalyzer` so that it applies to all of the handlers.

PR Close #34557

packages/compiler-cli/ngcc/src/analysis/decoration_analyzer.ts

@@ -137,6 +137,7 @@ export class DecorationAnalyzer {
   analyzeProgram(): DecorationAnalyses {
     const decorationAnalyses = new DecorationAnalyses();
     const analyzedFiles = this.program.getSourceFiles()
+                              .filter(sourceFile => !sourceFile.isDeclarationFile)
                               .filter(sourceFile => isWithinPackage(this.packagePath, sourceFile))
                               .map(sourceFile => this.analyzeFile(sourceFile))
                               .filter(isDefined);