[clang-tidy][NFC] Fix bugprone-suspicious-enum-usage tests

Fixes failure in tests from a bugprone-suspicious-enum-usage check
by limiting those test to C++17 only to make CI green.
Tests were broken by change introduced in pull request llvm#73105

Author: PiotrZSL

clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-enum-usage-strict.cpp

@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s bugprone-suspicious-enum-usage %t -- -config="{CheckOptions: {bugprone-suspicious-enum-usage.StrictMode: true}}" --
+// RUN: %check_clang_tidy -std=c++17 %s bugprone-suspicious-enum-usage %t -- -config="{CheckOptions: {bugprone-suspicious-enum-usage.StrictMode: true}}" --
 
 enum A {
   A = 1,
@@ -71,7 +71,7 @@ int trigger() {
   unsigned p = R;
   PP pp = Q;
   p |= pp;
-  
+
   enum X x = Z;
   p = x | Z;
   return 0;

clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-enum-usage.cpp

@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s bugprone-suspicious-enum-usage %t -- -config="{CheckOptions: {bugprone-suspicious-enum-usage.StrictMode: false}}" --
+// RUN: %check_clang_tidy -std=c++17 %s bugprone-suspicious-enum-usage %t -- -config="{CheckOptions: {bugprone-suspicious-enum-usage.StrictMode: false}}"
 
 enum Empty {
 };
@@ -79,7 +79,7 @@ int dont_trigger() {
   int d = c | H, e = b * a;
   a = B | C;
   b = X | Z;
-  
+
   if (Tuesday != Monday + 1 ||
       Friday - Thursday != 1 ||
       Sunday + Wednesday == (Sunday | Wednesday))