Pull request #4651: file_api: making current_context as nullptr before it gets the...

Pull request #4651: file_api: making current_context as nullptr before it gets the value of ctx

Merge in SNORT/snort3 from ~SUMIKUM7/snort3:coverity_CSCwo20068_snort to master

Squashed commit of the following:

commit 4004df617faf5598c181ae672b1b304e3e440c1b
Author: Sumit Kumar <sumikum7@cisco.com>
Date:   Wed Mar 5 15:31:53 2025 +0530

    file_api: making current_context as nullptr before it gets the value of ctx

    file_api: since current_context would never be file_got hence removing this style check

    file_api: making current_context as nullptr before it gets the value of ctx and removing redundant part of if check