Re-enable tests on Ubuntu 20.04

The previously failing tests have been fixed (#12164).

Closes #12645.

PiperOrigin-RevId: 351977950
diff --git a/.bazelci/postsubmit.yml b/.bazelci/postsubmit.yml
index 7175df2..b0cd1c0 100644
--- a/.bazelci/postsubmit.yml
+++ b/.bazelci/postsubmit.yml
@@ -182,14 +182,6 @@
       - "//tools/python/..."
       # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/8162
       - "-//src/java_tools/import_deps_checker/..."
-      # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/12164
-      - "-//src/test/shell/bazel:bazel_coverage_cc_released_test_gcc"
-      - "-//src/test/shell/bazel:bazel_coverage_sh_test"
-      - "-//src/test/shell/bazel:python_version_test"
-      - "-//src/test/shell/bazel:bazel_cc_code_coverage_test"
-      - "-//src/test/shell/bazel/android:android_ndk_integration_test"
-      - "-//src/test/shell/bazel:bazel_coverage_cc_head_test_gcc"
-      - "-//src/test/shell/bazel/android:android_ndk_integration_test_with_head_android_tools"
     include_json_profile:
       - build
       - test
diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index 648d5f1..5cef8e1 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -174,14 +174,6 @@
       - "//tools/python/..."
       # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/8162
       - "-//src/java_tools/import_deps_checker/..."
-      # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/12164
-      - "-//src/test/shell/bazel:bazel_coverage_cc_released_test_gcc"
-      - "-//src/test/shell/bazel:bazel_coverage_sh_test"
-      - "-//src/test/shell/bazel:python_version_test"
-      - "-//src/test/shell/bazel:bazel_cc_code_coverage_test"
-      - "-//src/test/shell/bazel/android:android_ndk_integration_test"
-      - "-//src/test/shell/bazel:bazel_coverage_cc_head_test_gcc"
-      - "-//src/test/shell/bazel/android:android_ndk_integration_test_with_head_android_tools"
   macos:
     shards: 5
     shell_commands: