Rollup merge of #61545 - flip1995:internal_lints, r=oli-obk

Implement another internal lints

cc #49509

This adds ~~two~~ one internal lint~~s~~:
1. LINT_PASS_IMPL_WITHOUT_MACRO: Make sure, that the `{declare,impl}_lint_pass` macro is used to implement lint passes. cc #59669
2. ~~USAGE_OF_TYCTXT_AND_SPAN_ARGS: item 2 on the list in #49509~~

~~With 2. I wasn't sure, if this lint should be applied everywhere. That means a careful review of 0955835 would be great. Also 73fb9b4 allows this lint on some functions. Should I also apply this lint there?~~

TODO (not directly relevant for review):
- [ ] https://github.com/rust-lang/rust/pull/59316#discussion_r280186517 (not sure yet, if this works or how to query for `rustc_private`, since it's not in [`Features`](https://doc.rust-lang.org/nightly/nightly-rustc/syntax/feature_gate/struct.Features.html) 🤔 cc @eddyb)
- [x] https://github.com/rust-lang/rust/pull/61735#discussion_r292389870
- [x] Check explicitly for the `{declare,impl}_lint_pass!` macros

r? @oli-obk

src/librustc_codegen_llvm/lib.rs

@@ -23,7 +23,6 @@
 #![feature(trusted_len)]
 #![feature(mem_take)]
 #![deny(rust_2018_idioms)]
-#![deny(internal)]
 #![deny(unused_lifetimes)]
 
 use back::write::{create_target_machine, create_informational_target_machine};