Upgrade to Fedora 36 and Mono 6.12.0.178, newer toolchains

- F36 gives us MinGW GCC 11.2.1 and binutils 2.37 for Windows builds.
  * Had to downgrade autotools to F35 version for Mono wasm builds.
- OSX and iOS builds now use LLVM 14 for osxcross.
- Emscripten updated to 3.1.10 for classical builds (still using
  1.39.9 for Mono).
- Mono 6.12.0.178, and updated godot-mono-builds to fix issue with
  btls-lib on macOS ARM64 (fixes #95).
- SCons 4.3.0.
- Linux toolchains not updated yet, need to prepare a new buildroot
  with latest GCC/binutils.

Dockerfile.base

@@ -1,10 +1,10 @@
-FROM fedora:34
+FROM fedora:36
 
 WORKDIR /root
 
 RUN dnf -y upgrade --setopt=install_weak_deps=False && \
     dnf -y install --setopt=install_weak_deps=False \
       bash bzip2 curl file findutils git make nano patch pkgconfig python3-pip unzip which xz && \
-    pip install scons==4.1.0
+    pip install scons==4.3.0
 
 CMD /bin/bash