feat: enable configurable multipart upload settings

[xuang7]

Purpose

This PR addresses issue #3610 by enabling users to configure multipart upload parameters dynamically. Previously, all file uploads used fixed settings that might not be optimal for different network conditions and file sizes. Users can now adjust chunk size and concurrent upload count to optimize upload and balance upload speed vs. memory usage based on their specific requirements.

Changes

• dataset-detailed.component.ts/scss/html:
  • Introduced an advanced settings panel under the file uploader, values will be revert if page refreshed.
  • Added two number inputs with minimum values of 1 MB (chunk size) and 1 part (concurrency).
  • Included tooltips explain the memory ↔ speed trade-off for each control.
• datasetservice.ts: Extended multipartUpload() signature to accept partSize and concurrencyLimit.
• gui-config.service.mock.ts/gui-config.ts: Switched default chunk‐size from bytes to MB/count.
• gui.conf/GuiConfig.scala/ConfigResource.scala: Switched default chunk‐size from bytes to MB/count.
• app.module.ts: Imported the NzInputNumberModule to support the new controls.

Demonstration

Advanced Settings panel under the file upload section (Default):

Expanded	Collapsed

Chunk size	Concurrent chunk

After adjustment:

Performance Comparison: