Add `fetchPriority` to `<img>` and `<link>` (#25927)

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## Summary

- Fixes https://github.com/facebook/react/issues/25682

## How did you test this change?

I tried this but it didn't work
```
yarn build --type=UMD_DEV react/index,react-dom && cd fixtures/attribute-behavior && yarn install && yarn start
```

Co-authored-by: eps1lon <silbermann.sebastian@gmail.com>

fixtures/attribute-behavior/AttributeTableSnapshot.md

@@ -3348,6 +3348,81 @@
 | `externalResourcesRequired=(null)`| (initial)| `<null>` |
 | `externalResourcesRequired=(undefined)`| (initial)| `<null>` |
 
+## `fetchPriority` (on `<img>` inside `<div>`)
+| Test Case | Flags | Result |
+| --- | --- | --- |
+| `fetchPriority=(string)`| (changed)| `"high"` |
+| `fetchPriority=(empty string)`| (initial)| `"auto"` |
+| `fetchPriority=(array with string)`| (changed)| `"high"` |
+| `fetchPriority=(empty array)`| (initial)| `"auto"` |
+| `fetchPriority=(object)`| (initial)| `"auto"` |
+| `fetchPriority=(numeric string)`| (initial)| `"auto"` |
+| `fetchPriority=(-1)`| (initial)| `"auto"` |
+| `fetchPriority=(0)`| (initial)| `"auto"` |
+| `fetchPriority=(integer)`| (initial)| `"auto"` |
+| `fetchPriority=(NaN)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(float)`| (initial)| `"auto"` |
+| `fetchPriority=(true)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(false)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(string 'true')`| (initial)| `"auto"` |
+| `fetchPriority=(string 'false')`| (initial)| `"auto"` |
+| `fetchPriority=(string 'on')`| (initial)| `"auto"` |
+| `fetchPriority=(string 'off')`| (initial)| `"auto"` |
+| `fetchPriority=(symbol)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(function)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(null)`| (initial)| `"auto"` |
+| `fetchPriority=(undefined)`| (initial)| `"auto"` |
+
+## `fetchpriority` (on `<img>` inside `<div>`)
+| Test Case | Flags | Result |
+| --- | --- | --- |
+| `fetchpriority=(string)`| (changed, warning)| `"high"` |
+| `fetchpriority=(empty string)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(array with string)`| (changed, warning)| `"high"` |
+| `fetchpriority=(empty array)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(object)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(numeric string)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(-1)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(0)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(integer)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(NaN)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(float)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(true)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(false)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(string 'true')`| (initial, warning)| `"auto"` |
+| `fetchpriority=(string 'false')`| (initial, warning)| `"auto"` |
+| `fetchpriority=(string 'on')`| (initial, warning)| `"auto"` |
+| `fetchpriority=(string 'off')`| (initial, warning)| `"auto"` |
+| `fetchpriority=(symbol)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(function)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(null)`| (initial, warning)| `"auto"` |
+| `fetchpriority=(undefined)`| (initial, warning)| `"auto"` |
+
+## `fetchPriority` (on `<link>` inside `<div>`)
+| Test Case | Flags | Result |
+| --- | --- | --- |
+| `fetchPriority=(string)`| (changed)| `"high"` |
+| `fetchPriority=(empty string)`| (initial)| `"auto"` |
+| `fetchPriority=(array with string)`| (changed)| `"high"` |
+| `fetchPriority=(empty array)`| (initial)| `"auto"` |
+| `fetchPriority=(object)`| (initial)| `"auto"` |
+| `fetchPriority=(numeric string)`| (initial)| `"auto"` |
+| `fetchPriority=(-1)`| (initial)| `"auto"` |
+| `fetchPriority=(0)`| (initial)| `"auto"` |
+| `fetchPriority=(integer)`| (initial)| `"auto"` |
+| `fetchPriority=(NaN)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(float)`| (initial)| `"auto"` |
+| `fetchPriority=(true)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(false)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(string 'true')`| (initial)| `"auto"` |
+| `fetchPriority=(string 'false')`| (initial)| `"auto"` |
+| `fetchPriority=(string 'on')`| (initial)| `"auto"` |
+| `fetchPriority=(string 'off')`| (initial)| `"auto"` |
+| `fetchPriority=(symbol)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(function)`| (initial, warning)| `"auto"` |
+| `fetchPriority=(null)`| (initial)| `"auto"` |
+| `fetchPriority=(undefined)`| (initial)| `"auto"` |
+
 ## `fill` (on `<path>` inside `<svg>`)
 | Test Case | Flags | Result |
 | --- | --- | --- |

fixtures/attribute-behavior/src/attributes.js

@@ -573,6 +573,24 @@ const attributes = [
     tagName: 'path',
     read: getSVGAttribute('externalResourcesRequired'),
   },
+  {
+    name: 'fetchPriority',
+    overrideStringValue: 'high',
+    tagName: 'img',
+    read: getProperty('fetchPriority'),
+  },
+  {
+    name: 'fetchpriority',
+    overrideStringValue: 'high',
+    tagName: 'img',
+    read: getProperty('fetchPriority'),
+  },
+  {
+    name: 'fetchPriority',
+    overrideStringValue: 'high',
+    tagName: 'link',
+    read: getProperty('fetchPriority'),
+  },
   {
     name: 'fill',
     containerTagName: 'svg',

packages/react-dom-bindings/src/shared/possibleStandardNames.js

@@ -60,6 +60,7 @@ const possibleStandardNames = {
   draggable: 'draggable',
   enctype: 'encType',
   enterkeyhint: 'enterKeyHint',
+  fetchpriority: 'fetchPriority',
   for: 'htmlFor',
   form: 'form',
   formmethod: 'formMethod',