feat(github-copilot): support GitHub Enterprise data-residency Copilot auth (#99221)

Adds GitHub Enterprise data-residency support to the existing bundled GitHub Copilot provider.

Maintainer proof:
- GitHub CI green on head 54010a6538
- `check-lint`, `check-additional-extension-bundled`, and `check-shrinkwrap` passed in CI
- local `pnpm lint:extensions:bundled`, `pnpm lint`, and focused GitHub Copilot Vitest passed
- AWS Crabbox proof passed
- live microsoft.ghe.com device-flow/token-exchange/model-catalog proof passed

Co-authored-by: Tobias Oort <tobias.oort@ict.nl>
Co-authored-by: Gio Della-Libera <235387111+giodl73-repo@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

scripts/plugin-sdk-surface-report.mjs

@@ -195,12 +195,12 @@ export function readPluginSdkSurfaceBudgets(env = process.env) {
     ),
     publicExports: readPluginSdkSurfaceBudgetEnv(
       "OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS",
-      10464,
+      10465,
       env,
     ),
     publicFunctionExports: readPluginSdkSurfaceBudgetEnv(
       "OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_FUNCTION_EXPORTS",
-      5221,
+      5222,
       env,
     ),
     publicDeprecatedExports: readPluginSdkSurfaceBudgetEnv(