* Removes test_program_entry_debug().
* Uses declare_process_instruction!() in all tests and benchmarks.
* Replaces with ProcessInstructionWithContext with solana_rbpf::BuiltInFunction.
* Makes members of SyscallContext public.
Removes check_aligned and check_size from SyscallContext.
* Replaces InvokeContext::set_syscall_context() in tests with mock_create_vm!().
* Passes SyscallContext directly to InvokeContext::set_syscall_context().
* Merges TraceLogStackFrame into SyscallContext.
* Removes the create_vm!() macro.
* Moves BpfAllocator from bpf_loader into program_runtime.
* Frees BpfAllocator from Rc<RefCell<>>.
* Removes unused code from BpfAllocator.
* Consume CUs for heap before doing the allocation.
* Exposes syscalls in rbpf-cli.
* Adds debugging_features parameter to load_program_from_bytes() and load_program_from_account().
* Removes test_bpf_loader_non_terminating_program() as that is already tested in RBPF.
* Moves stack and heap allocation back onto the program runtime stack.
* Uses declare_process_instruction!() in all tests.
* Adds post_adjustments to mock_process_instruction().
Removes "solana_sbf_rust_external_spend" from assert_instruction_count() as it panics.
* Moves stable_log::program_invoke(), stable_log::program_success() and stable_log::program_failure() calls from bpf_loader into InvokeContext::process_executable_chain().
* Turns result of ProcessInstructionWithContext from InstructionError into Box<dyn std::error::Error>.
* Bump to solana_rbpf v0.3.0
* Removes Result from return type of EbpfVm::new().
* Turns EbpfError into Box<dyn std::error::Error>.
* Removes BpfError.
* Removes SyscallError::InstructionError.
* Adds a type alias for Box<dyn std::error::Error> in syscalls.
* Uses InvokeContext::process_instruction() in mock_process_instruction().
* Uses InvokeContext::process_instruction() in tests of loader-v3.
* Only throw InstructionError::BuiltinProgramsMustConsumeComputeUnits if result.is_ok().
* Adds CU cost to loader-v3.