roll: pigweed pw_result: Add missing CTAD guide to pw::unexpected

The standard requires the following deduction guide:

```
template<class E> unexpected(E) -> unexpected<E>;
```

This change adds this line and removes the explicit template arguments
in the tests to ensure it is tested.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237112
Original-Revision: 0ffb69decbf0ea112899d115c34d01b4441ad5ca

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: df5369eda85375..0ffb69decbf0ea
Roller-URL: https://ci.chromium.org/b/8736240918199553249
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia96e141cc8996f9a6a828a7587d509085c2311ed
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/236788
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index 59768e2..d6e746e 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -49,8 +49,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-20.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8736260437429487089.
-    commit = "df5369eda8537543da4a67c8dbf32711564d587c",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8736240918199553249.
+    commit = "0ffb69decbf0ea112899d115c34d01b4441ad5ca",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -58,8 +58,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-20.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8736260437429487089.
-    commit = "df5369eda8537543da4a67c8dbf32711564d587c",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8736240918199553249.
+    commit = "0ffb69decbf0ea112899d115c34d01b4441ad5ca",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )