chore(build): Remove version numbers from build artifact names

Copied from https://github.com/apache/flagon-useralejs/issues/506

**Problem**

Build artifact names contain the version number. This creates a dependency between our test suite (see [here](https://github.com/apache/flagon-useralejs/blob/4eec2ffd87880bc96858f2802b054058eeebb003/test/unit/spec/main.html#L20), for example) and the version number. Not only is this a blocker for automation, it will create flaky tests on every release.

**Solution**

Remove version numbers from the build artifact name. The only place version numbers need be included is on the release channels (NPM, apache), not in built js files themselves.

Start by tracing the build process that produces the built JS files and compare its artifact names with the test reference in test/unit/spec/main.html, cited in the linked UseraleJS issue. Done means built artifact names no longer contain version numbers, while NPM and Apache release channels continue to include them; verify the test suite no longer depends on versioned filenames.

Written by the indexing model from the issue text.