Fix misc. tests (#2534)

- Remove a function from memory-packing_all-features.wast, because it
  does not test anything meaningful after #2529.
- Rename a test file to use `--all-features`; it started failing I guess
  because `exnref` requires also reference type features, but not sure
  why it was OK so far.

Author: aheejin

…t-stack-ir_enable-exception-handling.txt …stack-ir_print-stack-ir_all-features.txttest/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_enable-exception-handling.txt renamed to test/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_all-features.txt test/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_enable-exception-handling.txt renamed to test/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_all-features.txt

@@ -33,11 +33,4 @@
   )
   (unreachable)
  )
- (func $bar (; 1 ;)
-  (drop
-   (loop $loop-in (result i32)
-    (i32.const 42)
-   )
-  )
- )
 )

…-stack-ir_enable-exception-handling.wast …tack-ir_print-stack-ir_all-features.wasttest/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_enable-exception-handling.wast renamed to test/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_all-features.wast test/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_enable-exception-handling.wast renamed to test/passes/generate-stack-ir_optimize-stack-ir_print-stack-ir_all-features.wast

@@ -27,11 +27,4 @@
    (i32.const 0)
   )
  )
- (func $bar
-  (drop
-   (loop (result i32)
-    (i32.const 42)
-   )
-  )
- )
 )