Missing default .netrc location

### Description of the bug:

Search directory from environment variable _USERPROFILE_ is missing in the .netrc discovery implementation in [GoogleAuthUtils.java](https://github.com/bazelbuild/bazel/blob/8.2.1/src/main/java/com/google/devtools/build/lib/authandtls/GoogleAuthUtils.java#L355)

Issue https://github.com/bazelbuild/bazel/issues/10867 already requested adding the windows default _USERPROFILE_ location - but it is only realized in [UrlRewriter.java](https://github.com/bazelbuild/bazel/blob/8.2.1/src/main/java/com/google/devtools/build/lib/bazel/repository/downloader/UrlRewriter.java#L302)

E.g.
_http_archive_ successfully uses the .netrc in _USERPROFILE_ but bazel option _--remote_cache_ does not as it uses the faulty/incomplete implementation.

### Which category does this issue belong to?

Remote Execution

### What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Windows host with Bazel Version 8.2.1 and a .netrc file with valid credentials for the remote cache in the windows user home directory.
Environment Variables _NETRC_ and _HOME_ are not set or at least do not contain a .netrc file.

Execute a Bazel build using a remote cache

_bazel build --remote_cache=SERVER TARGET -s_.

You should get a HTTP error code 401 "Unauthorized" and on inspection of the HTTP GET request you should see that the authentication header is missing.

### Which operating system are you running Bazel on?

Windows 10 Enterprise

### What is the output of `bazel info release`?

release 8.2.1

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

_No response_

### What's the output of `git remote get-url origin; git rev-parse HEAD` ?

```text

```

### If this is a regression, please try to identify the Bazel commit where the bug was introduced with bazelisk --bisect.

_No response_

### Have you found anything relevant by searching the web?

Feature request for _USERPROFILE_ usage for windows: https://github.com/bazelbuild/bazel/issues/10867

### Any other information, logs, or outputs that you want to share?

_No response_

Start in src/main/java/com/google/devtools/build/lib/authandtls/GoogleAuthUtils.java at the .netrc discovery implementation, then compare the related logic in src/main/java/com/google/devtools/build/lib/bazel/repository/downloader/UrlRewriter.java. Reproduce the Windows remote-cache case described with USERPROFILE set and HOME and NETRC unset. Done means remote-cache requests use credentials from the Windows user home .netrc.

Written by the indexing model from the issue text.