sdk: Add SyscallStubs to enable syscall interception when building programs for non-BPF (bp #12984) (#12993)

* Add SyscallStubs to enable syscall interception when building programs for non-BPF

(cherry picked from commit 9c53e1dfb2)

* Remove program_stubs!()

(cherry picked from commit 6d5889bdb5)

Co-authored-by: Michael Vines <mvines@gmail.com>

programs/bpf/rust/sha256/src/lib.rs

@@ -25,8 +25,6 @@ pub extern "C" fn entrypoint(_input: *mut u8) -> u64 {
 #[cfg(test)]
 mod test {
     use super::*;
-    // Pull in syscall stubs when building for non-BPF targets
-    solana_sdk::program_stubs!();
 
     #[test]
     fn test_sha256() {