[SYCL][NFC] Use unique_ptr for storing ModuleDesc. (#20358)
This patch resolves a warning about expensive copy in function
invocation which accepts ModuleDesc by value, thus taking ownership of
ModuleDesc. Now ownership is transferred into functions by using
unuqie_ptr. Also, the patch removes many usages of r-value references in
function's arguments because r-value reference supposes a ownership
transfer but does not oblige that.
