[REM-2981] Move ssh-unrelated code outside of HAVE_LIBSSH ifdef

Description

Function was written in an ifdef when it should not have been, preventing Remmina from compiling without ssh enabled.

Related Issue

#2981 (closed)

Motivation and Context

Remmina should not require shh to build.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.