build(clang-analyzer): suppress clang-analyzer-security.ArrayBound

Problem:
clang 21 promoted alpha.security.ArrayBoundV2 to security.ArrayBound
(stable). This new check reports false-positive "out of bound access"
errors in drawline.c and vimscript.c, where the analyzer constructs
impossible paths (e.g. concealed line with draw_text=false yet ptr
advanced past the NUL terminator, or root AST node with a "next"
sibling).

Per-line NOLINT suppression doesn't work because the analyzer finds
multiple paths to the same false positive.

Solution:
Disable clang-analyzer-security.ArrayBound globally in the
clang-analyzer cmake target until the check matures.

Co-Authored-By: Claude

0 files changed, 0 insertions, 0 deletions