Disable cxx abi in ansible when building pt/xla for branch r2.0 (#5332)

Author: vanbasten23

infra/ansible/config/env.yaml

@@ -33,6 +33,7 @@ build_env:
     BAZEL_REMOTE_CACHE: 1
     SILO_NAME: "cache-silo-{{ arch }}-{{ accelerator }}-{{ clang_version }}"
     DISABLE_XRT: "{{ disable_xrt }}"
+    _GLIBCXX_USE_CXX11_ABI: 0
 
   amd64:
     ARCH: amd64

infra/ansible/roles/build_srcs/tasks/main.yaml

@@ -24,7 +24,7 @@
 
 - name: Build XLA computation client library
   ansible.builtin.command:
-    cmd: bash build_torch_xla_libs.sh -O -D_GLIBCXX_USE_CXX11_ABI=1
+    cmd: bash build_torch_xla_libs.sh
     chdir: "{{ (src_root, 'pytorch/xla') | path_join }}"
   environment: "{{ env_vars }}"
   when: build_torch_xla_libs_result.stat.exists