fix(pivotGrid): Set pivot date dimension locale data to avoid performance drops.

[skrustev]

IgniteUI/igniteui-blazor#232

Type of Change (check all that apply):

• Bug fix
• New functionality
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (no functional changes)
• Documentation
• Demos
• CI/CD
• Tests
• Changelog
• Skills/Agents

Component(s) / Area(s) Affected:

Pivot Grid

How Has This Been Tested?

• Unit tests
• Manual testing
• Automated e2e tests

Test Configuration:

• Angular version:
• Browser(s):
• OS:

Screenshots / Recordings

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them
• Accessibility (ARIA, keyboard navigation, focus management) has been verified

[Copilot]

Pull request overview

This PR targets Pivot Grid performance degradation by ensuring IgxPivotDateDimension instances receive the grid’s current locale and resource strings, and by passing that locale into month formatting.

Changes:

• Added setDateDimensionsLocaleData() in IgxPivotGridComponent and invoked it when pivotConfiguration is set and when i18n resources change.
• Extended IgxPivotDateDimension with an internal locale property and used it in the month memberFunction formatting call.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
projects/igniteui-angular/grids/pivot-grid/src/pivot-grid.component.ts	Introduces locale/resource propagation to pivot date dimensions and hooks it into configuration + i18n change points.
projects/igniteui-angular/grids/core/src/pivot-grid-dimensions.ts	Adds locale to IgxPivotDateDimension and passes it into month formatting.