T-Tracer: add T_messages_creator wrapper functions for UL PHY trace logging

Introduce T_messages_creator.h/.c with 7 modular wrapper functions
(log_ul_fd_dmrs, log_ul_fd_pusch_iq, log_ul_fd_chan_est_dmrs_pos,
log_ul_fd_chan_est_dmrs_interpl, log_ul_payload_rx_bits,
log_ul_payload_tx_bits, log_ul_scrambled_tx_bits) that encapsulate
T() macro calls with structured PHY metadata fields.
Replaces scattered inline T() calls across PHY source files.

common/utils/T/T.h

@@ -115,7 +115,7 @@ extern int T_stdout;
 
 /* type used to send arbitrary buffer data */
 typedef struct {
-  void *addr;
+  const void *addr;
   int length;
 } T_buffer;