samples: cellular: nrf_cloud_multi_service: More modem RX shared memory #18468
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The sample reads certificates while checking their validity to give better error messages.
PR #17189 optimized modem shared memory to 4kB for both TX and RX. This is too small for RX with several certificates.
Issues seen with three Root CAs causing modem to eventually crash as there is not enough RPC memory for the response.
So increasing
CONFIG_NRF_MODEM_LIB_SHMEM_RX_SIZE
by letting it use default value of ~8kB.Jira: TNSW-64434