refactor(test): Simplify check_pubsub_subscribe_msgrcvtimeout.c #992

Job	Run time
Debug Build & Unit Tests (gcc)	3m 48s
Debug Build & Unit Tests (gcc, 32bit)	4m 16s
Debug Build & Unit Tests without Subscriptions (gcc)	2m 27s
Debug Build & Unit Tests with Diagnostics (gcc)	3m 30s
Debug Build & Unit Tests with multithreading (gcc)	2m 38s
Debug Build & Unit Tests with Alarms&Conditions (gcc)	12m 52s
Debug Build & Unit Tests (clang)	5m 6s
Debug Build & Unit Tests (tcc)	2m 57s
Encryption (MbedTLS) Build & Unit Tests (gcc)	2m 42s
PubSub Encryption (MbedTLS) Build & Unit Tests (gcc)	3m 23s
PubSub SKS Build & Unit Tests (gcc)	5m 8s
Encryption (OpenSSL) Build & Unit Tests (gcc)	2m 54s
Encryption (LibreSSL) Build & Unit Tests (gcc)	6m 13s
TPM Tool Build	3m 25s
Release Build	1m 35s
Amalgamation Build	1m 20s
Amalgamation Build with Multithreading	1m 10s
Valgrind Build & Unit Tests with MbedTLS (gcc)	17m 3s
Valgrind Build & Unit Tests with OpenSSL (gcc)	17m 19s
Valgrind Examples with MbedTLS (gcc)	1h 9m 18s
Valgrind Examples with OpenSSL (gcc)	36m 51s
Clang Static Analyzer	5m 20s
Build All Companion Specifications	15m 48s
	3h 47m 3s

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