Fix curl install using Intel compilers (#41380)

When using Intel to build curl, add 'CFLAGS=-we147' to the configure
args to fix error 'compiler does not halt on function prototype
mismatch'

var/spack/repos/builtin/packages/curl/package.py

@@ -345,6 +345,12 @@ def determine_variants(cls, exes, version):
     def command(self):
         return Executable(self.prefix.bin.join("curl-config"))
 
+    def flag_handler(self, name, flags):
+        build_system_flags = []
+        if name == "cflags" and self.spec.compiler.name in ["intel", "oneapi"]:
+            build_system_flags = ["-we147"]
+        return flags, None, build_system_flags
+
 
 class AutotoolsBuilder(AutotoolsBuilder):
     def configure_args(self):