fix(ivy): clone ts.SourceFile in ivy_switch when triggered (#27032)

Make a copy of the ts.SourceFile before modifying it in the ivy_switch
transform. It's suspected that the Bazel tsc_wrapped host's SourceFile
cache has issues when the ts.SourceFiles are mutated.

PR Close #27032

packages/compiler-cli/src/ngtsc/switch/src/switch.ts

@@ -42,6 +42,7 @@ function flipIvySwitchInFile(sf: ts.SourceFile): ts.SourceFile {
 
   // Only update the statements in the SourceFile if any have changed.
   if (newStatements !== undefined) {
+    sf = ts.getMutableClone(sf);
     sf.statements = ts.createNodeArray(newStatements);
   }
   return sf;