roll: pigweed pw_bluetooth_sapphire: Remove uses of EventCallbackVariant

Remove EventCallbackVariant uses in ScoConnectionManager and
BrEdrConnectionManager now that they are only used in conjunction
with EmbossEventCallbacks.

Original-Bug: b/42167863
Test: pw presubmit --step gn_chre_googletest_nanopb_sapphire_build
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246312
Original-Revision: ef86a47f69065196b3c5ee0a6b2616e4e3bd553a

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 19e98dd2e2b099..ef86a47f690651
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8732434052619578081
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I64f2d90228becb1ee66121443e40bf1e127c0cf7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/showcase/sense/+/245688
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 9ece2ae..590398a 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -49,8 +49,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-11-01.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8732444920945328833.
-    commit = "19e98dd2e2b099c5e860aea0d948ccf705039929",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8732434052619578081.
+    commit = "ef86a47f69065196b3c5ee0a6b2616e4e3bd553a",
     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 2024-11-01.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8732444920945328833.
-    commit = "19e98dd2e2b099c5e860aea0d948ccf705039929",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8732434052619578081.
+    commit = "ef86a47f69065196b3c5ee0a6b2616e4e3bd553a",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )