Fix localized Conda named environment creation

[Copilot]

Conda named environment creation could silently route to the prefix flow when VS Code used a translated display language. The flow stored the localized “Named” label, then compared it against the English literal "Named".

• Conda creation flow
  • Compare against CondaStrings.condaNamed instead of a hard-coded English string.
  • Keep the multi-workspace “force named environment” path consistent with the localized discriminator.

return state.envType === CondaStrings.condaNamed ? enterEnvironmentName : selectLocation;

• Regression coverage
  • Added a focused unit test that simulates a localized “Named” label and verifies the flow prompts for an environment name and calls named Conda creation.

• Fixes Conda "Named" environment creation silently does nothing when the display language is not English #1767