refactor(tests): Move remaining tests to posix 64.

* Update docs and fix up a few lingering tests
  to consistently use native_posix_64 target.

docs/docs/development/posix-board.md

@@ -21,18 +21,18 @@ apt install -y gcc-multilib
 ## Building
 
 To do this, you can build ZMK targeting the
-`native_posix` board.
+`native_posix_64` board.
 
 ```
-west build --pristine --board native_posix
+west build --pristine --board native_posix_64 -- -DZMK_CONFIG=tests/none/normal/
 ```
 
 Once built, you can run the firmware locally:
 
 ```
-./build/zephyr/zephyr.exe
+./build/zephyr/zmk.exe
 ```
 
 ## Virtual Key Events
 
-The virtual key presses are hardcoded in `boards/native_posix.overlay` file, should you want to change the sequence to test various actions like Mod-Tap, etc.
+The virtual key presses are hardcoded in `boards/native_posix_64.overlay` file, should you want to change the sequence to test various actions like Mod-Tap, etc.

docs/docs/development/tests.md

@@ -4,7 +4,7 @@ sidebar_label: Tests
 ---
 
 - Running tests requires [native posix support](posix-board.md).
-- Any folder under `/app/tests` containing `native_posix.keymap` will be selected when running `west test`.
+- Any folder under `/app/tests` containing `native_posix_64.keymap` will be selected when running `west test`.
 - Run tests from within the `/zmk/app` directory.
 - Run a single test with `west test <testname>`, like `west test tests/toggle-layer/normal`.
 
@@ -13,7 +13,7 @@ sidebar_label: Tests
 1. Copy the test set that most closely resembles the tests you will be creating.
 2. Rename the newly created test set to the behavior you're testing e.g, toggle-layer
 3. Modify `behavior_keymap.dtsi` to create a keymap using the behavior and related behaviors
-4. Modify `test_case/native_posix.keymap` for a simulated use case
+4. Modify `test_case/native_posix_64.keymap` for a simulated use case
 5. Modify `test_case/events.patterns` to collect relevant logs to the test
    - See: [sed manual](https://www.gnu.org/software/sed/manual/sed.html) and
      [tutorial](https://www.digitalocean.com/community/tutorials/the-basics-of-using-the-sed-stream-editor-to-manipulate-text-in-linux)