fix: strip EXIF metadata when withMetadata is false without explicit adjustments (#18629)

[PINYOPATTANAWASANPORN]

Summary of Changes

• In packages/transformer-sharp/src/transformFile.ts, updated the early bypass condition in ransformMain so that when withMetadata: false is configured on the upload collection, images without dimensions adjustments (
  esizeOptions, ormatOptions, rimOptions, constructorOptions) are still passed through Sharp's transformation pipeline (
  otate() + optionallyAppendMetadata()) rather than early-returning { status: 'continue' } with raw unaltered buffers.
• Added a unit test in packages/transformer-sharp/src/transformFile.spec.ts asserting that ransformMain processes the image and strips EXIF metadata when withMetadata: false is configured without explicit adjustments.

Root Cause / Technical Context

Fixes #18629.
When an upload collection specifies withMetadata: false without resizing or format conversions, ransformMain in packages/transformer-sharp/src/transformFile.ts previously bypassed Sharp completely via:
ypescript if (!fileIsAnimatedType && !fileHasAdjustments) { return { status: 'continue' } }
This caused the unmodified uploaded buffer to be written directly to storage, preserving raw EXIF metadata (GPS geographic coordinates, camera device info, timestamps). Checking withMetadata !== false ensures that collections configured to strip metadata correctly invoke Sharp to produce sanitized file buffers.

Verification & Testing

• Added unit test: should strip EXIF metadata when withMetadata is false without image adjustments in ransformFile.spec.ts.
• Validated that crop, ocalPoint, and collections with withMetadata === true or custom callbacks retain expected metadata behavior.
• Minimal surgical diff (1-line code change + unit test).

Impact & Compatibility

• Breaking changes: None.
• Fully backward-compatible with existing transformers and upload collections.