[BOLT][Refactoring] Get rid of TailCallTerminatedBlocks, etc.

Summary:
More changes to allow separation of CFG construction and
profile assignment. Misc cleanups.

(cherry picked from FBD6158653)

Author: maksfb

bolt/BinaryBasicBlock.h

@@ -115,6 +115,8 @@ class BinaryBasicBlock {
 
 private:
   BinaryBasicBlock() = delete;
+  BinaryBasicBlock(const BinaryBasicBlock &) = delete;
+  BinaryBasicBlock& operator=(const BinaryBasicBlock &) = delete;
 
   explicit BinaryBasicBlock(
       BinaryFunction *Function,