Lint against unnecessary await

[ef4]

This enables linting against unnecessary await in .ts files. It's not enabled on .gts files because unfortunately the type-aware lint rules don't work correctly yet with the gts parser.

[github-actions]

Host Test Results

       1 files  ±    0         1 suites  ±0   34m 31s ⏱️ + 16m 38s
   656 tests ±    0     654 ✔️  -     1  1 💤 ±0  0 ❌ ±0  1 🔥 +1 
1 322 runs  +661  1 316 ✔️ +656  2 💤 +1  2 ❌ +2  2 🔥 +2 

For more details on these errors, see this check.

Results for commit fed0cf8. ± Comparison against base commit 0036e88.

♻️ This comment has been updated with latest results.

[habdelra]

Sees to be some issues with this PR. Seeing a bunch of errors like this after merging upstream changes:

not ok 36 Chrome 128.0 - [undefined ms] - Global error: Uncaught Error: Error loading room Error: Assertion Failed: You attempted to update `_value` on `TrackedStorageImpl`, but it had already been used previously in the same computation.  Attempting to update a value after using it in a computation can cause logical errors, infinite revalidation bugs, and performance issues, and is not supported.

`_value` was first used:

- While rendering:
  -top-level
    application
      index
        TestDriver
          OperatorModeContainer
            Modal
              InteractSubmode
                SubmodeLayout
                  ResizablePanelGroup
                    Panel
                      AiAssistantToast
                        (result of a `unknown` helper)
                          (result of a `unknown` helper)
                            (result of a `unknown` helper)
                              this.isVisible

[habdelra]

Ugh, could this possibly be related to not awaiting?

   ...
not ok 55 Chrome 128.0 - [1391 ms] - Integration | ai-assistant-panel: replacement message should use `created` from the oldest message
    ---
        actual: >
            Wednesday Jan 3, 2024, 12:31 PM Second message body
        expected: >
            Wednesday Jan 3, 2024, 12:30 PM First replacement message body
        stack: >
                at DOMAssertions.includesText (http://localhost:7357/assets/chunk.cd199c2f507c1ac91271.js:64009:10)
                at DOMAssertions.containsText