Revert "Fix UBB model details in Copilot CLI (#316452)"

[lramos15]

This reverts commit a1803b2.

[Copilot]

Pull request overview

Reverts the earlier change set that enhanced Copilot CLI model metadata (pricing/category) and updated the bundled @github/copilot dependency, restoring the prior dependency version and associated behaviors.

Changes:

• Reverts @github/copilot from 1.0.48 back to 1.0.39 (and updates the lockfile accordingly).
• Removes Copilot CLI model metadata fields related to UBB pricing/category (and the associated token pricing normalization).
• Simplifies the model picker’s price-category labeling behavior and adjusts the Copilot CLI SDK binary allowlist test to match the reverted SDK contents.

Show a summary per file

File	Description
src/vs/workbench/contrib/chat/browser/widget/input/chatModelPicker.ts	Reverts price category label handling to only recognize known tiers.
extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLISDKUpgrade.spec.ts	Reverts the expected native-binary inventory to match the downgraded SDK package contents.
extensions/copilot/src/extension/chatSessions/copilotcli/node/copilotCli.ts	Reverts Copilot CLI model metadata enrichment (price category + token pricing normalization).
extensions/copilot/package.json	Downgrades @github/copilot dependency version.
extensions/copilot/package-lock.json	Updates lockfile to reflect the downgraded @github/copilot and platform packages.

Copilot's findings

Files not reviewed (1)

• extensions/copilot/package-lock.json: Language not supported

• Files reviewed: 4/5 changed files
• Comments generated: 0