[test] Pin tests using -dot-callgraph to legacy PM

[aeubanks]

Summary

-dot-callgraph is not ported to the NPM yet. It can be ported at a later
time if necessary.

llvm/test/Other/heat-colors-graphs.ll

-; RUN: opt < %s -dot-cfg -cfg-heat-colors -cfg-dot-filename-prefix=%t 2>/dev/null
+; RUN: opt %s -dot-cfg -cfg-heat-colors -cfg-dot-filename-prefix=%t -disable-output
 ; RUN: FileCheck %s -input-file=%t.f.dot --check-prefixes=CHECK-CFG,CHECK-BOTH
-; RUN: opt %s -dot-callgraph -callgraph-heat-colors -callgraph-dot-filename-prefix=%t 2>/dev/null
+; RUN: opt -enable-new-pm=0 %s -dot-callgraph -callgraph-heat-colors -callgraph-dot-filename-prefix=%t -disable-output
 ; RUN: FileCheck %s -input-file=%t.callgraph.dot --check-prefix=CHECK-BOTH
 
 ; CHECK-BOTH: color="#{{[(a-z)(0-9)]+}}", style={{[a-z]+}}, fillcolor="#{{[(a-z)(0-9)]+}}"
 ; CHECK-CFG: color="#{{[(a-z)(0-9)]+}}", style={{[a-z]+}}, fillcolor="#{{[(a-z)(0-9)]+}}"
 ; CHECK-CFG: color="#{{[(a-z)(0-9)]+}}", style={{[a-z]+}}, fillcolor="#{{[(a-z)(0-9)]+}}"
 
 define void @f(i32) {
 entry:

llvm/test/Other/heat-colors-multigraph.ll

-; RUN: opt %s -dot-callgraph -callgraph-multigraph -callgraph-dot-filename-prefix=%t 2>/dev/null
+; RUN: opt -enable-new-pm=0 %s -dot-callgraph -callgraph-multigraph -callgraph-dot-filename-prefix=%t -disable-output
 ; RUN: FileCheck %s -input-file=%t.callgraph.dot --check-prefix=CHECK-MULTIGRAPH
-; RUN: opt %s -dot-callgraph -callgraph-dot-filename-prefix=%t 2>/dev/null
+; RUN: opt -enable-new-pm=0 %s -dot-callgraph -callgraph-dot-filename-prefix=%t -disable-output
 ; RUN: FileCheck %s -input-file=%t.callgraph.dot --check-prefix=CHECK
 
 ; CHECK-MULTIGRAPH: {external caller}
 ; CHECK-NOT: {external caller}
 
 define void @bar() {
   ret void
 }
 
 define void @foo() {
   call void @bar()
   ret void
 }