Revert "Stop caching sysvars, instead load them ahead of time (backport #21108) (#22466)"

This reverts commit 5d3f3bc9b1.

sdk/program/src/sysvar/mod.rs

@@ -1,7 +1,6 @@
 //! named accounts for synthesized data accounts for bank state, etc.
 //!
 use crate::{account_info::AccountInfo, program_error::ProgramError, pubkey::Pubkey};
-use lazy_static::lazy_static;
 
 pub mod clock;
 pub mod epoch_schedule;
@@ -14,25 +13,17 @@ pub mod slot_hashes;
 pub mod slot_history;
 pub mod stake_history;
 
-lazy_static! {
-    pub static ref ALL_IDS: Vec<Pubkey> = vec![
-        clock::id(),
-        epoch_schedule::id(),
-        #[allow(deprecated)]
-        fees::id(),
-        #[allow(deprecated)]
-        recent_blockhashes::id(),
-        rent::id(),
-        rewards::id(),
-        slot_hashes::id(),
-        slot_history::id(),
-        stake_history::id(),
-        instructions::id(),
-    ];
-}
-
 pub fn is_sysvar_id(id: &Pubkey) -> bool {
-    ALL_IDS.iter().any(|key| key == id)
+    clock::check_id(id)
+        || epoch_schedule::check_id(id)
+        || fees::check_id(id)
+        || recent_blockhashes::check_id(id)
+        || rent::check_id(id)
+        || rewards::check_id(id)
+        || slot_hashes::check_id(id)
+        || slot_history::check_id(id)
+        || stake_history::check_id(id)
+        || instructions::check_id(id)
 }
 
 #[macro_export]