Add support for importing variables that enclose synthesized variables

[jeskew]

Resolves #12464

Import closure calculation is not currently taking "synthesized" variables (i.e., the results of functions like loadJsonContent) into account.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 6894311504)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 6894311504

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 6894311504"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 6894311504

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 6894311504"

[github-actions]

Test Results

     141 files  +       9       141 suites  +9   4h 49m 10s ⏱️ - 6m 13s
10 861 tests +       2  10 860 ✔️ +       3  0 💤 ±0  1 ❌  - 1 
55 226 runs  +2 867  55 225 ✔️ +2 868  0 💤 ±0  1 ❌  - 1 

For more details on these failures, see this check.

Results for commit 0f63194. ± Comparison against base commit 2a19a18.

♻️ This comment has been updated with latest results.