fix: correctly detect glb & gltf mimetypes during upload (#12623)

### What?

The browser was incorrectly setting the mimetype for `.glb` and `.gltf`
files to `application/octet-stream` when uploading when they should be
receiving proper types consistent with `glb` and `gltf`.

This patch adds logic to infer the correct `MIME` type for `.glb` files
(`model/gltf-binary`) & `gltf` files (`model/gltf+json`) based on file
extension during multipart processing, ensuring consistent MIME type
detection regardless of browser behavior.

Fixes #12620

test/uploads/payload-types.ts

@@ -82,6 +82,7 @@ export interface Config {
     media: Media;
     'animated-type-media': AnimatedTypeMedia;
     enlarge: Enlarge;
+    'without-enlarge': WithoutEnlarge;
     reduce: Reduce;
     'media-trim': MediaTrim;
     'custom-file-name-media': CustomFileNameMedia;
@@ -103,6 +104,7 @@ export interface Config {
     'hide-file-input-on-create': HideFileInputOnCreate;
     'best-fit': BestFit;
     'list-view-preview': ListViewPreview;
+    'three-dimensional': ThreeDimensional;
     users: User;
     'payload-locked-documents': PayloadLockedDocument;
     'payload-preferences': PayloadPreference;
@@ -125,6 +127,7 @@ export interface Config {
     media: MediaSelect<false> | MediaSelect<true>;
     'animated-type-media': AnimatedTypeMediaSelect<false> | AnimatedTypeMediaSelect<true>;
     enlarge: EnlargeSelect<false> | EnlargeSelect<true>;
+    'without-enlarge': WithoutEnlargeSelect<false> | WithoutEnlargeSelect<true>;
     reduce: ReduceSelect<false> | ReduceSelect<true>;
     'media-trim': MediaTrimSelect<false> | MediaTrimSelect<true>;
     'custom-file-name-media': CustomFileNameMediaSelect<false> | CustomFileNameMediaSelect<true>;
@@ -146,6 +149,7 @@ export interface Config {
     'hide-file-input-on-create': HideFileInputOnCreateSelect<false> | HideFileInputOnCreateSelect<true>;
     'best-fit': BestFitSelect<false> | BestFitSelect<true>;
     'list-view-preview': ListViewPreviewSelect<false> | ListViewPreviewSelect<true>;
+    'three-dimensional': ThreeDimensionalSelect<false> | ThreeDimensionalSelect<true>;
     users: UsersSelect<false> | UsersSelect<true>;
     'payload-locked-documents': PayloadLockedDocumentsSelect<false> | PayloadLockedDocumentsSelect<true>;
     'payload-preferences': PayloadPreferencesSelect<false> | PayloadPreferencesSelect<true>;
@@ -848,6 +852,24 @@ export interface Enlarge {
     };
   };
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "without-enlarge".
+ */
+export interface WithoutEnlarge {
+  id: string;
+  updatedAt: string;
+  createdAt: string;
+  url?: string | null;
+  thumbnailURL?: string | null;
+  filename?: string | null;
+  mimeType?: string | null;
+  filesize?: number | null;
+  width?: number | null;
+  height?: number | null;
+  focalX?: number | null;
+  focalY?: number | null;
+}
 /**
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "reduce".
@@ -1289,6 +1311,22 @@ export interface ListViewPreview {
   updatedAt: string;
   createdAt: string;
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "three-dimensional".
+ */
+export interface ThreeDimensional {
+  id: string;
+  updatedAt: string;
+  createdAt: string;
+  url?: string | null;
+  thumbnailURL?: string | null;
+  filename?: string | null;
+  mimeType?: string | null;
+  filesize?: number | null;
+  width?: number | null;
+  height?: number | null;
+}
 /**
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "users".
@@ -1373,6 +1411,10 @@ export interface PayloadLockedDocument {
         relationTo: 'enlarge';
         value: string | Enlarge;
       } | null)
+    | ({
+        relationTo: 'without-enlarge';
+        value: string | WithoutEnlarge;
+      } | null)
     | ({
         relationTo: 'reduce';
         value: string | Reduce;
@@ -1457,6 +1499,10 @@ export interface PayloadLockedDocument {
         relationTo: 'list-view-preview';
         value: string | ListViewPreview;
       } | null)
+    | ({
+        relationTo: 'three-dimensional';
+        value: string | ThreeDimensional;
+      } | null)
     | ({
         relationTo: 'users';
         value: string | User;
@@ -2219,6 +2265,23 @@ export interface EnlargeSelect<T extends boolean = true> {
             };
       };
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "without-enlarge_select".
+ */
+export interface WithoutEnlargeSelect<T extends boolean = true> {
+  updatedAt?: T;
+  createdAt?: T;
+  url?: T;
+  thumbnailURL?: T;
+  filename?: T;
+  mimeType?: T;
+  filesize?: T;
+  width?: T;
+  height?: T;
+  focalX?: T;
+  focalY?: T;
+}
 /**
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "reduce_select".
@@ -2692,6 +2755,21 @@ export interface ListViewPreviewSelect<T extends boolean = true> {
   updatedAt?: T;
   createdAt?: T;
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "three-dimensional_select".
+ */
+export interface ThreeDimensionalSelect<T extends boolean = true> {
+  updatedAt?: T;
+  createdAt?: T;
+  url?: T;
+  thumbnailURL?: T;
+  filename?: T;
+  mimeType?: T;
+  filesize?: T;
+  width?: T;
+  height?: T;
+}
 /**
  * This interface was referenced by `Config`'s JSON-Schema
  * via the `definition` "users_select".