Migrate apple-mobile-web-* to mobile-web-*. (#154964)

Closes https://github.com/flutter/flutter/issues/154596.

It's less clear to me if your goal was to migrate _all_ of these btw:
https://github.com/search?q=org%3Aflutter+%22mobile-web-app-capable%22&type=code

dev/integration_tests/web/web/index.html

@@ -9,7 +9,7 @@ found in the LICENSE file. -->
 
   <title>Web Test</title>
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_blocked_service_workers.html

@@ -9,7 +9,7 @@ found in the LICENSE file. -->
 
   <title>Web Test</title>
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_flutterjs.html

@@ -9,7 +9,7 @@ found in the LICENSE file. -->
 
   <title>Web Test</title>
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_flutterjs_custom_sw_version.html

@@ -10,7 +10,7 @@ found in the LICENSE file. -->
   <title>Integration test. App load with flutter.js. Custom serviceWorkerVersion provided.</title>
 
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_flutterjs_el_nonce.html

@@ -13,7 +13,7 @@ found in the LICENSE file. -->
   <meta http-equiv="Content-Security-Policy" content="script-src 'nonce-SOME_NONCE' 'wasm-unsafe-eval'; font-src https://fonts.gstatic.com; style-src 'nonce-SOME_NONCE'; worker-src 'self';">
 
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_flutterjs_el_tt_on.html

@@ -13,7 +13,7 @@ found in the LICENSE file. -->
   <meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script'">
 
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_flutterjs_entrypoint_loaded.html

@@ -9,7 +9,7 @@ found in the LICENSE file. -->
 
   <title>Integration test. App load with flutter.js and onEntrypointLoaded API</title>
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_with_flutterjs_short.html

@@ -9,7 +9,7 @@ found in the LICENSE file. -->
 
   <title>Web Test</title>
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">
 

dev/integration_tests/web/web/index_without_flutterjs.html

@@ -9,7 +9,7 @@ found in the LICENSE file. -->
 
   <title>Web Test</title>
   <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
   <meta name="apple-mobile-web-app-title" content="Web Test">