Cleanup: Format <optional> include order.

This is an automated patch. Please avoid assigning unrelated bug.
 #cleanup

This is a follow-up to @thestig comment:
https://chromium-review.googlesource.com/c/chromium/src/+/5009410/7/pdf/accessibility_helper.cc#11

Several developers, including myself rewrote optional without properly
reordering the #includes at the beginning.
This patches automatically fixes it.

Script:
-------

```
function replace {
  echo "Replacing $1 by $2"
  git grep -l "$1" \
    | cut -f1 -d: \
    | grep -v \
      -e "*win*" \
      -e "third_party/*" \
      -e "tools/*" \
    | grep \
      -e "\.h" \
      -e "\.cc" \
    | sort \
    | uniq \
    | xargs sed -i "s/$1/$2/g"
}

replace "#include <optional>" ""
git add -u
git commit -m "remove optional"
git revert HEAD --no-commit
git add -u
echo "Formatting":
echo "IncludeBlocks: Regroup" >> ".clang-format"
echo "IncludeIsMainRegex: \"(_(android|apple|chromeos|freebsd|fuchsia|fuzzer|ios|linux|mac|nacl|openbsd|posix|stubs?|win))?(_(unit|browser|perf)?tests?)?$\"" >> ".clang-format"
git add -u
git cl format --upstream=HEAD
git checkout origin/main -- ".clang-format"
git add -u
git commit -m "revert with format"
git reset --soft origin/main
git add -u
git commit -m "Automated format"
```

cleanup: This is a no-op patch formatting includes.
Bug: 40288126
Change-Id: I5f61b1207c097a4c6b20a034f9d1b323975b1851
AX-Relnotes: n/a.
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5335142
Owners-Override: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1267143}
NOKEYCHECK=True
GitOrigin-RevId: 5bc3326c91b582cbec543bc9896201a1c56bdebd
2 files changed