feat(bazel): use rbe_autoconfig() and new container. (#29336)

After this PR is merged, maintainers no longer need to update .bazelrc
file, toolchain and platform related flags for RBE builds and tests
(unless there is a breaking change in Bazel related to those flags).

Maintainers just need to update the pin of @bazel-toolchains repo
regularly in the packages/bazel/package.bzl file according to
https://releases.bazel.build/bazel-toolchains.html to include the
latest checked-in toolchain configs. If rbe_autoconfig() cannot find
appropriate toolchain configs for the version of Bazel in the version of
@bazel_toolchains repo that is currently used by this project, it will pull
down the container and generate the configs on the fly as the beginning
of the build/test.

PR Close #29336

.circleci/config.yml

@@ -167,7 +167,8 @@ jobs:
       - *attach_workspace
       - *init_environment
       - *setup_circleci_bazel_config
-
+      # Enable remote/sibling docker which is needed by auto-selection of toolchain configs for RBE.
+      - setup_remote_docker
       # Setup remote execution and run RBE-compatible tests.
       - *setup_bazel_remote_execution
       - run: yarn bazel test //... --build_tag_filters=-ivy-only --test_tag_filters=-ivy-only
@@ -180,6 +181,8 @@ jobs:
       - *attach_workspace
       - *init_environment
       - *setup_circleci_bazel_config
+      # Enable remote/sibling docker which is needed by auto-selection of toolchain configs for RBE.
+      - setup_remote_docker
       - *setup_bazel_remote_execution
 
         # We need to explicitly specify the --symlink_prefix option because otherwise we would
@@ -409,6 +412,8 @@ jobs:
       - *attach_workspace
       - *init_environment
       - *setup_circleci_bazel_config
+      # Enable remote/sibling docker which is needed by auto-selection of toolchain configs for RBE.
+      - setup_remote_docker
       - *setup_bazel_remote_execution
 
       - run: scripts/build-packages-dist.sh
@@ -435,6 +440,8 @@ jobs:
       - *attach_workspace
       - *init_environment
       - *setup_circleci_bazel_config
+      # Enable remote/sibling docker which is needed by auto-selection of toolchain configs for RBE.
+      - setup_remote_docker
       - *setup_bazel_remote_execution
 
       - run: scripts/build-ivy-npm-packages.sh