fix(developer): dist path for server 🎢

[mcdurdin]

Fixes #6859.

Addresses the test blocks encountered in #6848, #6849. Note that I have now rebased those two PRs off this PR chain, so that they can be tested and merged independently. It turns out that this fix is needed for those PRs, because this broke with the removal of Lerna in #6525 (we postponed regression testing of Developer on that PR because we knew we needed to do it anyway). So I am going to do some more rebasing so we can get these all tested.

The production path needed to have all files under the build/dist/ folder, not just the build/ folder. This was broken in the refactor in #6630.

User Testing

This 🎢 reorganisation chain impacts Windows and Developer. This means we need to run regression tests on the impacted products. I do not anticipate serious issues but there is potential for errors that are not picked up in the build process.

• TEST_WINDOWS: Please run a full regression test on Keyman for Windows.
• TEST_DEVELOPER: Please run a full regression test on Keyman Developer.

I have verified that this fixes the test block encountered in #6848.

[keymanapp-test-bot]

User Test Results

Test specification and instructions

• ✅ TEST_WINDOWS (PASSED): See regression test in test(windows): Regression Tests for PR6860 #6870.
• ✅ TEST_DEVELOPER (PASSED): See regression test in test(Developer): Regression test for PR6860 #6882.

Test Artifacts

• Developer
  • Keyman Developer
• Keyboards
  • Test Keyboards
• Windows
  • Keyman for Windows
  • FirstVoices Keyboards for Windows

[mcdurdin]

Test Results

• TEST_WINDOWS (PASSED): See regression test in test(windows): Regression Tests for PR6860 #6870.
• TEST_DEVELOPER (PASSED): See regression test in test(Developer): Regression test for PR6860 #6882.