We discovered that[ some stress testing configurations |https://spruce.mongodb.com/task/wiredtiger_ubuntu2004_stress_tests_format_stress_sanitizer_test_1_patch_d8ad63dd6758ff16cf785868234cd9d009044671_6854b45e5b66b700073a2c91_25_06_20_01_09_21/logs?execution=0]contain tons of the following messages:

[2025/06/19 23:21:06.816] ERROR: ld.so: object '/data/mci/d81bbbb7d1b9af5b42404ea1ac21bf74/wiredtiger/TCMALLOC_LIB/libtcmalloc.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored. 

That could mean that this configuration didn't build TCMalloc successfully before sourcing it. 

However there are some configurations, that have pretty similar logic, but doesn't have this issue (example).

The main goal of this ticket is to fix this issue and create a protection that would cause hard failure in case when TCMalloc is requested but cannot be sourced.