Remove all autotools usage (#10132)

* Bazelfying conformance tests

Adding infrastructure to "Bazelify" languages other than Java and C++

* Delete benchmarks for languages supported by other repositories

* Bazelfying benchmark tests

* Bazelfying python

Use upb's system python rule instead of branching tensorflow

* Bazelfying Ruby

* Bazelfying C#

* Bazelfying Objective-c

* Bazelfying Kokoro mac builds

* Bazelfying Kokoro linux builds

* Deleting all deprecated files from autotools cleanup

This boils down to Makefile.am and tests.sh and all of their remaining references

* Cleanup after PR reorganizing

- Enable 32 bit tests
- Move conformance tests back
- Use select statements to select alternate runtimes
- Add internal prefixes to proto library macros

* Updating READMEs to use bazel instead of autotools.

* Bazelfying Kokoro release builds

* First round of review fixes

* Second round of review fixes

* Third round of review fixes

* Filtering out conformance tests from Bazel on Windows (b/241484899)

* Add version metadata that was previously scraped from configure.ac

* fixing typo from previous fix

* Adding ruby version tests

* Bumping pinned upb version, and adding tests to python CI
diff --git a/conformance/conformance_cpp.cc b/conformance/conformance_cpp.cc
index dd753ca..cbfd8b5 100644
--- a/conformance/conformance_cpp.cc
+++ b/conformance/conformance_cpp.cc
@@ -44,8 +44,7 @@
 #include <google/protobuf/util/type_resolver_util.h>
 #include <google/protobuf/stubs/status.h>
 #include <google/protobuf/stubs/statusor.h>
-#include "conformance.pb.h"
-#include "conformance.pb.h"
+#include "conformance/conformance.pb.h"
 #include <google/protobuf/test_messages_proto2.pb.h>
 #include <google/protobuf/test_messages_proto3.pb.h>
 #include <google/protobuf/test_messages_proto3.pb.h>