feat(tests): Update AST tests to seperate the different comps

Author: GeekMasher

ql/lib/codeql/bicep/AST.qll

@@ -1,5 +1,6 @@
 import ast.AstNodes
 import ast.Literals
+import ast.Conditionals
 import ast.Calls
 import ast.Expr
 import ast.Stmts