[mlgo][inliner] Tigher test for interactive mode (#141677)

Prompted by #141453 - have the test check the feature that was
previously clobbered in interactive mode, if the default decision was
requested.

Author: mtrofin

llvm/test/Transforms/Inline/ML/interactive-mode.ll

@@ -22,10 +22,19 @@
 ; CHECK-NEXT: sroa_savings: 0
 ; CHECK:      unsimplified_common_instructions: 5
 ; CHECK:      callee_users: 3
+; CHECK-DEFAULT: inlining_default: 1
+; CHECK:      observation: 1
+; CHECK:      callee_basic_block_count: 5
+; CHECK-DEFAULT: inlining_default: 0
+; CHECK:      observation: 2
+; CHECK-DEFAULT: inlining_default: 1
+; CHECK:      observation: 3
+; CHECK:      callee_basic_block_count: 1
 ; CHECK-DEFAULT: inlining_default: 0
+; CHECK:      observation: 4
 ; CHECK-DEFAULT: inlining_default: 1
 ; CHECK:      observation: 5
-; CHECK-NOT:  observation: 6
+; CHECK-DEFAULT: inlining_default: 1
 
 ; CHECK:      inlining_decision: 1
 ; CHECK-NEXT: inlining_decision: 0