[clang-tools-extra] [clang-tidy] Stop ignoring `-std` argument in `check_clang_tidy.py` for C files (PR #150791)

[Victor Chernyakin via cfe-commits]

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@@ -5,14 +5,14 @@
 // parsing and preprocessor state will not have that case.
 // UNSUPPORTED: target={{.*-(ps4|ps5)}}
 //
-// RUN: %check_clang_tidy -check-suffix=WITH-ANNEX-K            %s bugprone-unsafe-functions %t -- -- -D__STDC_LIB_EXT1__=1 -D__STDC_WANT_LIB_EXT1__=1
-// RUN: %check_clang_tidy -check-suffix=WITHOUT-ANNEX-K         %s bugprone-unsafe-functions %t -- -- -U__STDC_LIB_EXT1__   -U__STDC_WANT_LIB_EXT1__
-// RUN: %check_clang_tidy -check-suffix=WITHOUT-ANNEX-K         %s bugprone-unsafe-functions %t -- -- -D__STDC_LIB_EXT1__=1 -U__STDC_WANT_LIB_EXT1__
-// RUN: %check_clang_tidy -check-suffix=WITHOUT-ANNEX-K         %s bugprone-unsafe-functions %t -- -- -U__STDC_LIB_EXT1__   -D__STDC_WANT_LIB_EXT1__=1
-// RUN: %check_clang_tidy -check-suffix=WITH-ANNEX-K-CERT-ONLY  %s bugprone-unsafe-functions %t -- \
+// RUN: %check_clang_tidy -std=c11-or-later -check-suffix=WITH-ANNEX-K            %s bugprone-unsafe-functions %t -- -- -D__STDC_LIB_EXT1__=1 -D__STDC_WANT_LIB_EXT1__=1
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localspook wrote:

We do: this test doesn't work with C99 because Annex K is a C11 feature. I realized though that the default works for all the `-check-suffix=WITHOUT-ANNEX-K` cases, so I've restored those.

https://github.com/llvm/llvm-project/pull/150791