build(deps): bump third_party/abseil-cpp from `efb035a` to `99bbd7c` (#2250)

Bumps [third_party/abseil-cpp](https://github.com/abseil/abseil-cpp) from `efb035a` to `99bbd7c`.
- [Release notes](https://github.com/abseil/abseil-cpp/releases)
- [Commits](https://github.com/abseil/abseil-cpp/compare/efb035a5973b60d35ed8fcaa43e6736936a96173...99bbd7c4865c5d0f3bfbe99457c5ce4daf6ba174)

---
updated-dependencies:
- dependency-name: third_party/abseil-cpp
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

third_party/abseil-cpp

diff --git a/third_party/abseil-cpp b/third_party/abseil-cpp
index efb035a..99bbd7c 160000
--- a/third_party/abseil-cpp
+++ b/third_party/abseil-cpp
@@ -1 +1 @@
-Subproject commit efb035a5973b60d35ed8fcaa43e6736936a96173
+Subproject commit 99bbd7c4865c5d0f3bfbe99457c5ce4daf6ba174