[nrf noup] Handle moved PSA_EXPORT_KEY_PAIR_OR_PUBLIC_MAX_SIZE

-This noup will be in place util Mbed TLS 3.6.3 is introduced.
 It hinders duplication-issues for the symbol
 PSA_EXPORT_KEY_PAIR_OR_PUBLIC_MAX_SIZE which has moved from pk.c
 to the file psa/crypto_sizes.h

ref: NCSDK-30210

Signed-off-by: Frank Audun Kvamtrø <frank.kvamtro@nordicsemi.no>

Author: frkv

library/pk.c

@@ -35,10 +35,6 @@
 #include <limits.h>
 #include <stdint.h>
 
-#define PSA_EXPORT_KEY_PAIR_OR_PUBLIC_MAX_SIZE \
-    (PSA_EXPORT_KEY_PAIR_MAX_SIZE > PSA_EXPORT_PUBLIC_KEY_MAX_SIZE) ? \
-    PSA_EXPORT_KEY_PAIR_MAX_SIZE : PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
-
 /*
  * Initialise a mbedtls_pk_context
  */