Use languageVersion 2.0 when any compile-time imports are present

[jeskew]

Resolves #12899

#12899 highlighted a way in which an imported variable could enclose a user-defined type (and thus necessitate languageVersion 2.0). Since any imported value might require the elevated language version, this PR updates EmitterSettings to use lv 2.0 if any compile-time imports are used.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 7412012579)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 7412012579

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 7412012579"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 7412012579

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 7412012579"

[github-actions]

Test Results

    74 files   -    25      74 suites   - 25   28m 57s ⏱️ - 26m 53s
10 466 tests  -    14  10 465 ✅  -    15  0 💤 ±0  1 ❌ +1 
28 318 runs   - 9 818  28 316 ✅  - 9 820  0 💤 ±0  2 ❌ +2 

For more details on these failures, see this check.

Results for commit 8515bd2. ± Comparison against base commit df7406b.

♻️ This comment has been updated with latest results.