[clang] Compiler bug when compiling a ujson_derive file

Description

While working on https://github.com/lowRISC/opentitan/pull/27887, I identified what looks like a compiler bug in the clang that we used for the RISCV-32 toolchain. To reproduce, apply the following diff:

diff --git i/sw/device/tests/penetrationtests/json/cryptolib_fi_asym_commands.h w/sw/device/tests/penetrationtests/json/cryptolib_fi_asym_commands.h
index 303a338c12..46c7d6e43e 100644
--- i/sw/device/tests/penetrationtests/json/cryptolib_fi_asym_commands.h
+++ w/sw/device/tests/penetrationtests/json/cryptolib_fi_asym_commands.h
@@ -9,7 +9,7 @@
 extern "C" {
 #endif

+#define MODULE_ID MAKE_MODULE_ID('j', 'f', 'a')

 #define RSA_CMD_MAX_MESSAGE_BYTES 512
 #define RSA_CMD_MAX_N_BYTES 512

and run

 ./bazelisk.sh build --define bitstream=skip //sw/device/tests/penetrationtests/json:cryptolib_fi_asym_commands  --define DISABLE_VERILATOR_BUILD=true --config=riscv32

Compilation does not ever finish but the compiler quickly uses gigabytes of memory.

Apply the diff to sw/device/tests/penetrationtests/json/cryptolib_fi_asym_commands.h, then run the provided bazelisk.sh build command with the riscv32 configuration. Start by reproducing the non-terminating compilation and excessive memory use; done means the compiler behavior is understood and the build no longer exhibits that failure.