Revert "fix(compiler-cli): ensure getRootDirs() handles case-sensitivity (#36968)" (#37003)

This reverts commit 5bddeea559.

The changes to the case-sensitivity handling in #36968 caused multiple
projects to fail to build. See #36992, #36993 and #37000.

The issue is related to the logical path handling. But it is felt that
it is safer to revert the entire PR and then to investigate further.

PR Close #37003

packages/compiler-cli/src/ngtsc/util/src/typescript.ts

@@ -105,7 +105,7 @@ export function getRootDirs(host: ts.CompilerHost, options: ts.CompilerOptions):
   // See:
   // https://github.com/Microsoft/TypeScript/blob/3f7357d37f66c842d70d835bc925ec2a873ecfec/src/compiler/sys.ts#L650
   // Also compiler options might be set via an API which doesn't normalize paths
-  return rootDirs.map(rootDir => absoluteFrom(host.getCanonicalFileName(rootDir)));
+  return rootDirs.map(rootDir => absoluteFrom(rootDir));
 }
 
 export function nodeDebugInfo(node: ts.Node): string {