[Bug]: test build issues in LTS 20220623.1

### Describe the issue

When trying to run `bazel test @com_google_absl://...`, I encountered two build issues:
### `absl/hash/hash_test.cc`
```
external/com_google_absl/absl/hash/hash_test.cc: In instantiation of 'struct {anonymous}::IsAggregateInitializable >':
external/com_google_absl/absl/hash/hash_test.cc:909:3: required from here
external/com_google_absl/absl/hash/hash_test.cc:884:22: error: use of deleted function 'absl::lts_20220623::hash_internal::PoisonedHash::PoisonedHash()'
: std::true_type {};
^
In file included from external/com_google_absl/absl/hash/hash.h:85,
from external/com_google_absl/absl/hash/hash_test.cc:15:
external/com_google_absl/absl/hash/internal/hash.h:1208:3: note: declared here
PoisonedHash() = delete;
^~~~~~~~~~~~
external/com_google_absl/absl/hash/hash_test.cc:884:22: error: use of deleted function 'absl::lts_20220623::hash_internal::PoisonedHash::PoisonedHash()'
: std::true_type {};
^
In file included from external/com_google_absl/absl/hash/hash.h:85,
from external/com_google_absl/absl/hash/hash_test.cc:15:
external/com_google_absl/absl/hash/internal/hash.h:1208:3: note: declared here
PoisonedHash() = delete;
^~~~~~~~~~~~
```
This problem only seems to occur when building with `-std=gnu++17`. The line in question has a comment about GCC since version 9, so it's possible that GCC version 8 with `gnu++17` has the same problem.

### `absl/flags/flag_benchmark.cc`
Long error spew, but all coming from the same line:
```
external/com_google_absl/absl/flags/flag_benchmark.cc:246:62: error: no matching function for call to 'DoNotOptimize(bool (&)())'
int odr##T = (benchmark::DoNotOptimize(AbslInvokeGetFlag##T), 1);
^
external/com_google_absl/absl/flags/flag_benchmark.cc:88:3: note: in expansion of macro 'InvokeGetFlag'
A(bool) \
^
external/com_google_absl/absl/flags/flag_benchmark.cc:248:1: note: in expansion of macro 'BENCHMARKED_TYPES'
BENCHMARKED_TYPES(InvokeGetFlag)
^~~~~~~~~~~~~~~~~
```
(rest omitted)

The master branch has a fix for this in 553491a54cdb842ab583942e1058cbdcedd32018 which references issue #1340

### Steps to reproduce the problem

First issue:
```
git checkout lts_2022_06_23
env CC=/usr/bin/gcc-8 bazel test --cxxopt=-std=gnu++17 //absl/hash/...
```
Second issue needs a newer version of benchmark; update WORKSPACE:
```bzl
http_archive(
name = "com_github_google_benchmark", # 2021-09-20T09:19:51Z
sha256 = "6430e4092653380d9dc4ccb45a1e2dc9259d581f4866dc0759713126056bc1d7",
strip_prefix = "benchmark-1.7.1",
urls = ["https://github.com/google/benchmark/archive/refs/tags/v1.7.1.tar.gz"],
)
```
Then build:
```
env CC=/usr/bin/gcc-8 bazel build //absl/flags/...
```

### What version of Abseil are you using?

`8c0b94e793a66495e0b1f34a5eb26bd7dc672db0` (`lts_2022_06_23, tag: 20220623.1`)

### What operating system and version are you using?

Ubuntu 18.04

### What compiler and version are you using?

```
Using built-in specs.
COLLECT_GCC=gcc-8
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 8.4.0-1ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 8.4.0 (Ubuntu 8.4.0-1ubuntu1~18.04)
```

### What build system are you using?

bazel 6.0.0 and bazel 5.3.1

### Additional context

_No response_