fix(core): replace posix.relative with relative for path resolution (#30783)

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## Current Behavior
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Whenever using the new Typescript style repos (using package.json
instead of project.json for typescript projects), we get incorrect paths
when using `resolveImportWithRequire` on Windows. Currently when trying
to find a path, we end up with a path similar to
`../C:\\dev\\nx\\file.ts` which is incorrect.

## Expected Behavior
Changing `posix.relative` to just relative, allows us to get the proper
path on Windows like so: `.\\file.ts`

## Related Issue(s)
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merged. -->

Fixes #

Co-authored-by: Jack Hsu <jack.hsu@gmail.com>
Co-authored-by: Jason Jean <jasonjean1993@gmail.com>

Author: 3 people

packages/nx/src/plugins/js/project-graph/build-dependencies/target-project-locator.ts

@@ -397,7 +397,7 @@ export class TargetProjectLocator {
     normalizedImportExpr: string,
     filePath: string
   ) {
-    return posix.relative(
+    return relative(
       workspaceRoot,
       require.resolve(normalizedImportExpr, {
         paths: [dirname(filePath)],