[clang-tidy] Add new clang-tidy checks.

This adds bugprone-suspicious-memset-usage and
bugprone-terminating-continue.

Change-Id: I491065a911522001644d656424bd59774a73ced5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6490147
Commit-Queue: Julia Hansbrough <flowerhack@google.com>
Reviewed-by: Rick Byers <rbyers@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1453535}

.clang-tidy

@@ -8,6 +8,8 @@
                     bugprone-inaccurate-erase,
                     bugprone-string-constructor,
                     bugprone-string-integer-assignment,
+                    bugprone-suspicious-memset-usage,
+                    bugprone-terminating-continue,
                     bugprone-undefined-memory-manipulation,
                     bugprone-unique-ptr-array-mismatch,
                     bugprone-unused-raii,