compiler: implement method-set based AssignableTo and Implements (#5304)

* reflect: implement method-set based AssignableTo and Implements

Based on the design from #4376 by aykevl.
Fixes #4277, fixes #3580.

Co-authored-by: Ayke van Laethem <aykevanlaethem@gmail.com>

* builder: update expected binary sizes for reflect changes

* Make interface checks similar to invoke, allowing typeImplementsMethodSet and method info to be dropped when reflect is not present

* Add more tests that BigGo reflect tests

* Even more pruning

* Add go/token and net/url to passing tests

* Prune even further, I am less happy with this, though

* Update size test now that we are smaller

* Skip some tests

* elide method lists

* format, oops

* fix tests

* Add a panic, pull out constant to keep in sync

* Add debug info

* Remove code that was leftover from a previous refactor

---------

Co-authored-by: Ayke van Laethem <aykevanlaethem@gmail.com>

src/runtime/interface.go

@@ -90,6 +90,9 @@ func interfaceTypeAssert(ok bool) {
 	}
 }
 
+// Implemented in the internal/reflectlite package.
+func typeImplementsMethodSet(actualTypeNum, assertedMethodSet unsafe.Pointer) bool
+
 // The following declarations are only used during IR construction. They are
 // lowered to inline IR in the interface lowering pass.
 // See compiler/interface-lowering.go for details.