ci(iast): update google tests [backport 3.2] (#12945)

Backport 8226bd2 from #12939 to 3.2.

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

Co-authored-by: Alberto Vara <[email protected]>

Author: github-actions[bot]

ddtrace/appsec/_iast/_taint_tracking/tests/CMakeLists.txt

@@ -1,5 +1,7 @@
+cmake_minimum_required(VERSION 3.19)
+
 include(FetchContent)
-FetchContent_Declare(googletest URL https://github.com/google/googletest/archive/refs/tags/release-1.11.0.zip)
+FetchContent_Declare(googletest URL https://github.com/google/googletest/archive/refs/tags/v1.16.0.zip)
 FetchContent_MakeAvailable(googletest)
 
 enable_testing()