Exclude core libraries from facebook-hte-CArray

Summary:
Core C++ libraries at times will legitimately prefer C arrays for compile-time and build-size efficiency, so the `facebook-hte-CArray` clang-tidy check should not apply to them (see D115838145, which churned `fatal/test/test.h`).

This suppresses the check at each library root via `.clang-tidy` (`-facebook-hte-CArray` in the `Checks:` list), following the established pattern (D71309543, and folly which already suppresses it):

- `fatal`, `quic`, `thrift`: added `-facebook-hte-CArray,` to the existing `Checks:` list.
- `fizz`, `mcrouter`: created new `.clang-tidy` files.
- `folly`: no change (already suppressed).

All of `fatal`/`fizz`/`quic`/`thrift` are dirsync mirrors (`fbcode/` canonical), so only the `fbcode/` copies were edited; the `xplat/` mirrors are materialized automatically. `mcrouter` is fbcode-only. `InheritParentConfig: true` is preserved throughout.

[Session trajectory link](https://www.internalfb.com/intern/devai/devmate/inspector/?id=778cdb2e-6fa3-4ed5-b284-bd94785c2c36)

Reviewed By: AlnisM, jbeshay

Differential Revision: D115886198

fbshipit-source-id: 10daff840eb292073737473fb08d27335a940f93

Author: yfeldblum

mcrouter/.clang-tidy

@@ -0,0 +1,11 @@
+# NOTE there must be no spaces before the '-', so put the comma after.
+# When making changes, be sure to verify the output of the following command to ensure
+# the desired checks are enabled (run from the directory containing a .clang-tidy file):
+# clang-tidy -list-checks
+# NOTE: Please don't disable inheritance from the parent to make sure that common checks get propagated.
+---
+InheritParentConfig: true
+Checks: '
+-facebook-hte-CArray,
+'
+...