Disallow secure decorator on statements using imported types

[jeskew]

Resolves #12908

The @secure() decorator is disallowed on statements that refer to type aliases, but the current check is only looking for TypeAliasSymbols and misses imported types.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 7414267674)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 7414267674

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 7414267674"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 7414267674

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 7414267674"

[github-actions]

Test Results

    63 files   -     36      63 suites   - 36   25m 17s ⏱️ - 31m 9s
10 470 tests  -     14  10 470 ✅  -     13  0 💤 ±0  0 ❌  - 1 
25 435 runs   - 12 713  25 435 ✅  - 12 712  0 💤 ±0  0 ❌  - 1 

Results for commit fb4a0ab. ± Comparison against base commit 6dfa50e.