fix: allow test runner to discover tests in nested directories

[idavidrein]

Fix for Issue stdlib-js#2096

Problem

The test workflow was not running tests located in nested directories within package test folders. This was happening because the run_affected_tests script was using the -maxdepth 2 parameter with find, which limited the search depth and prevented finding test files in subdirectories of the test folder.

Solution

Removed the -maxdepth 2 restriction from the find command in the run_affected_tests script. Now the test runner will properly discover and run all test files, including those in nested directories.

Test Results

To verify this fix works:

1. Create a test structure with nested test files:

mkdir -p lib/node_modules/test-pkg/test/nested
echo "console.log(\"Test in nested directory\")" > lib/node_modules/test-pkg/test/nested/test.js

2. Run the find command with the old restriction:

find lib -maxdepth 2 -wholename "**/test/test*.js"
# No results

3. Run the find command with our fix:

find lib -wholename "**/test/test*.js"
# Output: lib/node_modules/test-pkg/test/nested/test.js

This demonstrates that the fix correctly finds test files in nested directories.

Testing Instructions

1. Clone this repository
2. Create a test structure with nested test files:

mkdir -p lib/node_modules/test-pkg/test/nested
echo "console.log(\"Test in nested directory\")" > lib/node_modules/test-pkg/test/nested/test.js

3. Run the following commands to verify the behavior:

# This command should find the nested test file
find lib -wholename "**/test/test*.js"

4. Alternatively, in a real-world package with nested tests, the workflow would now properly discover and run those tests.

The output of the tests above is as follows:

lib/node_modules/test-pkg/test/nested/test.js

This fix ensures that the CI workflow will now catch issues in tests located in nested directories, which was the problem identified in issue stdlib-js#2096.

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