chore(deps): update dependency com_google_googletest to v1.16.0 (#455)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [com_google_googletest](https://redirect.github.com/google/googletest)
| http_archive | minor | `v1.15.2` -> `v1.16.0` |

---

### Release Notes

<details>
<summary>google/googletest (com_google_googletest)</summary>

###
[`v1.16.0`](https://redirect.github.com/google/googletest/releases/tag/v1.16.0)

[Compare
Source](https://redirect.github.com/google/googletest/compare/v1.15.2...v1.16.0)

### Release Notes

GoogleTest will **not** accept patches of new features to the `v1.16.x`
branch.\
We recommend building GoogleTest from the latest commit instead.\
Exceptional critical bug fixes may be considered.

#### C++ Language Support

- GoogleTest requires at least C++14 and follows [Google's Foundational
C++ Support
Policy](https://opensource.google/documentation/policies/cplusplus-support).
See [this
table](https://redirect.github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md)
for a list of currently supported versions compilers, platforms, and
build tools.
- The `1.16.x` branch will be the last to support C++14. Future
development will [require at least
C++17](https://opensource.google/documentation/policies/cplusplus-support#c_language_standard).

#### Notable Changes

- Bazel `BUILD` files now reference repositories by their canonical
names from the [Bazel Central Registry](https://registry.bazel.build/)
(google/googletest@cee1ba1).
Users still using the old `WORKSPACE` system may need to use
`repo_mapping` on repositories that still use the old names.
- Testsuite properties as are now exported as XML elements, not
attributes
(google/googletest@b4aae50).

</details>

---

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---

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---

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tests/WORKSPACE

@@ -232,9 +232,9 @@ http_archive(
 # As a test dep of com_google_absl.
 http_archive(
     name = "com_google_googletest",
-    sha256 = "7b42b4d6ed48810c5362c265a17faebe90dc2373c885e5216439d37927f02926",
-    strip_prefix = "googletest-1.15.2",
-    urls = ["https://github.com/google/googletest/archive/v1.15.2.tar.gz"],
+    sha256 = "78c676fc63881529bf97bf9d45948d905a66833fbfa5318ea2cd7478cb98f399",
+    strip_prefix = "googletest-1.16.0",
+    urls = ["https://github.com/google/googletest/archive/v1.16.0.tar.gz"],
 )
 
 http_archive(