fix(@angular-devkit/build-angular): several fixes to assets and files writes in browser-esbuild builder

This commit ports angular#26016 to the esbuilder and also fixes an issue where assets were being outputted in the wrong directory.

Closes angular#26021

fix(@schematics/angular): change Twitter logo to X

Author: alan-agius4

packages/schematics/angular/application/files/common-files/src/app/app.component.html.template

@@ -311,10 +311,9 @@
   />
   <span>Welcome</span>
     <div class="spacer"></div>
-    <a aria-label="Angular on twitter" target="_blank" rel="noopener" href="https://twitter.com/angular" title="Twitter">
-      <svg id="twitter-logo" height="24" data-name="Logo" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 400">
-        <rect width="400" height="400" fill="none"/>
-        <path d="M153.62,301.59c94.34,0,145.94-78.16,145.94-145.94,0-2.22,0-4.43-.15-6.63A104.36,104.36,0,0,0,325,122.47a102.38,102.38,0,0,1-29.46,8.07,51.47,51.47,0,0,0,22.55-28.37,102.79,102.79,0,0,1-32.57,12.45,51.34,51.34,0,0,0-87.41,46.78A145.62,145.62,0,0,1,92.4,107.81a51.33,51.33,0,0,0,15.88,68.47A50.91,50.91,0,0,1,85,169.86c0,.21,0,.43,0,.65a51.31,51.31,0,0,0,41.15,50.28,51.21,51.21,0,0,1-23.16.88,51.35,51.35,0,0,0,47.92,35.62,102.92,102.92,0,0,1-63.7,22A104.41,104.41,0,0,1,75,278.55a145.21,145.21,0,0,0,78.62,23" fill="#fff"/>
+    <a aria-label="Angular on X" target="_blank" rel="noopener" href="https://twitter.com/angular" title="X">
+      <svg id="twitter-logo" xmlns="http://www.w3.org/2000/svg" height="24" width="24" data-name="Logo" viewBox="0 0 512 512" fill="#fff">
+        <path d="M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z"/>
       </svg>
     </a>
     <a aria-label="Angular on YouTube" target="_blank" rel="noopener" href="https://youtube.com/angular" title="YouTube">

tests/legacy-cli/e2e/assets/14.0-project/src/app/app.component.html

@@ -311,10 +311,9 @@
   />
   <span>Welcome</span>
     <div class="spacer"></div>
-    <a aria-label="Angular on twitter" target="_blank" rel="noopener" href="https://twitter.com/angular" title="Twitter">
-      <svg id="twitter-logo" height="24" data-name="Logo" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 400">
-        <rect width="400" height="400" fill="none"/>
-        <path d="M153.62,301.59c94.34,0,145.94-78.16,145.94-145.94,0-2.22,0-4.43-.15-6.63A104.36,104.36,0,0,0,325,122.47a102.38,102.38,0,0,1-29.46,8.07,51.47,51.47,0,0,0,22.55-28.37,102.79,102.79,0,0,1-32.57,12.45,51.34,51.34,0,0,0-87.41,46.78A145.62,145.62,0,0,1,92.4,107.81a51.33,51.33,0,0,0,15.88,68.47A50.91,50.91,0,0,1,85,169.86c0,.21,0,.43,0,.65a51.31,51.31,0,0,0,41.15,50.28,51.21,51.21,0,0,1-23.16.88,51.35,51.35,0,0,0,47.92,35.62,102.92,102.92,0,0,1-63.7,22A104.41,104.41,0,0,1,75,278.55a145.21,145.21,0,0,0,78.62,23" fill="#fff"/>
+    <a aria-label="Angular on X" target="_blank" rel="noopener" href="https://twitter.com/angular" title="X">
+      <svg id="twitter-logo" xmlns="http://www.w3.org/2000/svg" height="24" width="24" data-name="Logo" viewBox="0 0 512 512" fill="#fff">
+        <path d="M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z"/>
       </svg>
     </a>
     <a aria-label="Angular on YouTube" target="_blank" rel="noopener" href="https://youtube.com/angular" title="YouTube">