Adjust the method of loading the external preloaded shared libraries

[MisterRaindrop]

closes: #ISSUE_Number

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Change logs

Add a new mechanism to pre-load dynamic libraries during database startup. Controlled library inclusion through header files.

External lib is preloaded. Need to write to theprocess_shared_preload_libraries.h header file. This loads the external lib through the header file.

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Does this PR introduce any user-facing change?

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How was this patch tested?

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