Support validation & completions for property access on array element

[anthony-c-martin]

Closes #14839

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 10428449700)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 10428449700

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 10428449700"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 10428449700

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 10428449700"

[github-actions]

Dotnet Test Results

    71 files   -     36       1 errors  70 suites   - 37   22m 56s ⏱️ - 9m 3s
10 976 tests  -     83  10 976 ✅  -     83  0 💤 ±0  0 ❌ ±0 
19 365 runs   - 19 412  19 365 ✅  - 19 412  0 💤 ±0  0 ❌ ±0 

For more details on these parsing errors, see this check.

Results for commit 25ed70f. ± Comparison against base commit 98ed923.

♻️ This comment has been updated with latest results.