chore: update Angular to 22.0.0-rc.0

[Copilot]

Upgrades the project from Angular 21.x to Angular 22.0.0-rc.0 using ng update, including all automated migration schematics.

Changes

• Angular packages — all @angular/* and @angular-devkit/* packages bumped to 22.0.0-rc.0
• Build tooling — ng-packagr → 22.0.0-next.4, TypeScript → 6.0.3
• Node.js requirement — Angular 22 CLI requires Node.js ≥ v22.22.0 (up from v18/v20)
• Auto-migrations applied by ng update:
  • provideHttpClient() calls updated with withXhr() where HttpXhrBackend is used
  • provideClientHydration() updated with withNoIncrementalHydration() opt-out to retain pre-v22 behavior
  • Optional chaining expressions in templates wrapped with $safeNavigationMigration()
  • Extended diagnostics nullishCoalescingNotNullable & optionalChainNotNullable disabled in all tsconfig files
  • Test spec files updated (~370 files touched by migration schematics)

[damyanpetev]

@copilot the install seems to be failing for peer deps of angular-eslint to angular packages
https://github.com/IgniteUI/igniteui-angular/actions/runs/25916675579/job/76184965619?pr=17276
Add an dependency override for those package deps with the 22 versions

[Copilot]

@copilot the install seems to be failing for peer deps of angular-eslint to angular packages
https://github.com/IgniteUI/igniteui-angular/actions/runs/25916675579/job/76184965619?pr=17276
Add an dep...

Fixed in c0f0c6d. Added npm overrides entries for @angular-eslint/builder and @angular-eslint/schematics (the two packages with @angular/cli >= 21.0.0 < 22.0.0 peer deps) using "$@angular/cli" to reference the root-level Angular CLI version. Also updated the existing igniteui-angular-charts and igniteui-angular-core overrides from ^21.0.0 to ^22.0.0-rc.0. Verified npm ci completes cleanly with no ERESOLVE errors.