Interp sdb (#4911)

Interp sdb (#4911)

* [interpreter] Add beginnings of debugger support.

Handle debugger support similarly to the JIT:
- Add a MINT_SDB_SEQ_POINT instruction to the debugger IR. Replace it with a MINT_BREAKPOINT instruction when a breakpoint is placed.
- Store the sequence point information in the existing sequence point data structures.

* [interp] Add support for debugger stacktraces.

* [interp] Add support for debugger frame info.

* [interp] Connect seq points inside the same basic block so simple single stepping works.

* [interp] Link sequence points in different basic blocks the same way the JIT does it.

* [interp] Allocate some bitsets from a mempool.

* [interp] Rewrite the patching in the transform pass to make it a bit easier to understand.

* [interp] Add interruption support for sdb.

* [interp] Add support for mkrefany,refanytype and refanyval.

* [interp] Fix debugger failures.

* Add support for setting byref variables.
* Fix thread interruption when the top frame is an interpreter frame.
* Allow stack walks when a thread is suspended while transforming a method.
* Implement method entry/exit events.
* Fix ldstr+dynamic methods.

* [interp] Implement support for Debugger.Break.

* [interp] Change the offsets in MonoJitInfo/seq points into byte based from short based to reduce the amount of special casing needed in other parts of the code.

* [interp] Factor out the push/pop lmf code into a pair of helper functions.

* [mixed] Fix mixed mode EH.

* [interp] Implement support for MONO_VERBOSE_METHOD. Improve sequence point placement.

* [interp] Implement support for SetIP ().

Pass the target thread as an additional argument to mono_interp_set_resume_state (). Check the resume state after single
stepping/breakpoints in the interpreter.

* [interp] Disable the usage of the STLOC_NP opcodes when running under the debugger, it doesn't work if the ip is changed when the execution is stopped.

* [interp] Fix async stack walks in the debugger when the thread is in native code called from interpreter code.

* [interp] Fix the disable interpreter build.

* [interp] Fix the calculation of native offsets in the line number info.

* [interp] Fix the build.

* [interp] Make CMD_STACK_FRAME_GET_THIS behave the same when called on managed-to-native frames, with the interpreter, frame->has_ctx is set.

* [interp] Fix typos, remove some dead code, use g_print instead of printf in a few places, move some interpreter stubs to interp-stubs.c.