Fix some Windows specific test issues, and run most tests on GitHub CI.

  - Configure symlinks on Windows which allows tests to discover input files.
    - Fixes tests: `wav_sample_provider_test`, `wav_reader_test`.
    - Improves `encoder_main_lib_test`, but there are other issues here.
  - Update GitHub CI to run Windows most tests, filter out some ones that are buggy on Windows (for now).
  - Part of #6.

PiperOrigin-RevId: 671745927

.bazelrc

@@ -1,4 +1,8 @@
 build --linkopt=-lm
+# Runfiles are needed by several tests. Typically these are defaulted on for
+# non-Windows platforms.
+build --enable_runfiles
+
 # Use the default C++ toolchain to build the tools used during the
 # build.
 build --host_crosstool_top=@bazel_tools//tools/cpp:toolchain
@@ -14,3 +18,4 @@ build:macos --cxxopt=-std=c++20
 build:macos --cxxopt=-Wno-sign-compare
 
 build:windows --cxxopt=/std:c++20
+startup --windows_enable_symlinks

.github/actions/iamf-tools-builder/action.yml

@@ -16,8 +16,10 @@ runs:
         if [[ "${{inputs.platform}}" == "windows" ]]; then
           # Windows works best with a very short path as per https://bazel.build/configure/windows#long-path-issues.
           echo  "startup --output_user_root=C:/" >> .bazelrc
-          # Disable windows tests until some platform-specific bugs are fixed.
-          bazelisk build -c opt iamf/...
+          # Disable some windows tests until some platform-specific bugs are fixed.
+          TEST_FILTER=*:-FlacEncoder*:*TestVector.ValidateTestSuite*:EncoderMainLibTest.*
         else
-          bazelisk test -c opt iamf/...
+          TEST_FILTER=*
         fi
+        bazelisk test -c opt iamf/... --test_filter=${TEST_FILTER}
+