[6.3.0] Restore the classic desugar tool in the Bazel 6.3.0 branch so that the Bazel Android tools can be built for 6.3.0 without breaking backwards compatibility (#18909)

* Revert "Remove desugar binary from Bazel Android Tools"

This reverts commit 6d05f25.

Re-add "classic" desugar dependencies in the Bazel 6.3.0 branch so that a version of the Android tools can be built that includes the classic desugarer so that we don't introduce breaking changes in a minor release of Bazel.

* Revert "Clean Classic Desugar Source Code - Production - 2 / 2"

This reverts commit 8ec2428.

* Revert "Clean Classic Desugar Source Code - Production - 1 / 2"

This reverts commit 21efecd.

* Revert "Cleanup Classic Desugar Tests"

This reverts commit a8952f5.

* Revert "Remove Classic Desugar Tests (with a global exclusion config)"

This reverts commit 5767cba.

* Fix android_integration_test to work with the head Android tools. integration_test_setup.sh overrides the bazelrc in the test, so it must go before android_helper.sh which appends to the bazelrc to override the Android tools with the version built at head.

Author: ahumesky

.bazelci/presubmit.yml

@@ -265,6 +265,12 @@ tasks:
       - "//tools/test/..."
       # Re-enable the following tests on Windows:
       # https://github.com/bazelbuild/bazel/issues/4292
+      - "-//src/test/java/com/google/devtools/build/android/desugar/nest/..."
+      - "-//src/test/java/com/google/devtools/build/android/desugar/stringconcat/..."
+      - "-//src/test/java/com/google/devtools/build/android/desugar/testing/junit/..."
+      - "-//src/test/java/com/google/devtools/build/android/desugar/covariantreturn/..."
+      - "-//src/test/java/com/google/devtools/build/android/desugar/scan/..."
+      - "-//src/test/java/com/google/devtools/build/android/desugar/typeannotation/..."
       - "-//src/test/java/com/google/devtools/build/android/r8/..."
       - "-//src/test/java/com/google/devtools/build/lib/query2/cquery/..."
       - "-//src/test/java/com/google/devtools/build/lib/query2/engine/..."