[functionapp] Fix deletion of Flex Consumption always-ready instances with colon-separated names

[Copilot]

az functionapp scale config always-ready delete silently failed to remove always-ready entries whose names contain a colon (e.g. function:Function1), while http deletion worked. The ARM API may normalize function names to lowercase on storage, causing the original case-sensitive not in filter to miss the entry.

Changes

• src/functionapp/ — Overrides az functionapp scale config always-ready delete in the functionapp extension with a fixed implementation:
  • Case-insensitive name matching: compares x["name"].lower() against a lowercased set of setting_names, handling any ARM-side normalization
  • Explicit API version 2023-12-01: the original command in older CLI builds used 2023-01-01, which does not reliably return functionAppConfig.scaleAndConcurrency.alwaysReady
  • Safe navigation: uses .get() chaining throughout so missing functionAppConfig/scaleAndConcurrency keys don't raise KeyError

# Previously silently a no-op; now correctly removes the entry
az functionapp scale config always-ready delete \
  --resource-group MyRG --name MyApp \
  --setting-names function:Function1

Related command

az functionapp scale config always-ready delete

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (azdev required; see .azure-pipelines/templates/azdev_setup.yml for the install command until azdev==0.2.11b1 is on PyPI)
• My extension version conforms to the Extension version schema

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.

[azure-client-tools-bot-prd]

⚠️Azure CLI Extensions Breaking Change Test

⚠️functionapp

rule	cmd_name	rule_message	suggest_message
⚠️ 1011 - SubgroupAdd	functionapp scale	sub group functionapp scale added

[azure-client-tools-bot-prd]

Hi @copilot,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[yonzhan]

functionapp