Move all files installed below /usr/share in the same directory

Also move the grub theme to /usr/share/grub/themes/kali/ as installing
files in /boot/ is problematic on arm where /boot is often a vfat
partition that doesn't support hardlinks as required by dpkg.

Gbp-Dch: Full

share/icons/Flat-Remix-Blue-Dark/actions/scalable/transform-affect-pattern.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+ <defs>
+  <style id="current-color-scheme" type="text/css">
+   .ColorScheme-Text { color:#d3dae3; } .ColorScheme-Highlight { color:#5294e2; }
+  </style>
+ </defs>
+ <path style="fill:currentColor" class="ColorScheme-Text" d="M 2.0585938 3.0019531 L 4.203125 4.6328125 L 2 6.3085938 L 2 6.3417969 L 4.1796875 8.0019531 L 4.2265625 8.0019531 L 6.40625 6.3417969 L 4.203125 4.6660156 L 6.3945312 3.0019531 L 2.0585938 3.0019531 z M 6.4648438 3.0019531 L 8.6113281 4.6328125 L 10.753906 3.0019531 L 6.4648438 3.0019531 z M 10.917969 3.0019531 L 13 4.5859375 L 13 3.0019531 L 10.917969 3.0019531 z M 8.65625 4.6660156 L 6.453125 6.3417969 L 8.6328125 8.0019531 L 10.835938 6.3261719 L 8.65625 4.6660156 z M 10.835938 6.3261719 L 13 7.9707031 L 13 4.6796875 L 10.835938 6.3261719 z M 11.007812 9.0136719 L 11.007812 11.007812 L 9.0058594 11.007812 L 9.0058594 12.003906 L 11.007812 12.003906 L 11.007812 14 L 14.011719 11.505859 L 11.007812 9.0136719 z M 4 10.992188 L 4 12.021484 L 5 12.021484 L 5 10.992188 L 4 10.992188 z M 6.0175781 10.992188 L 6.0175781 12.021484 L 6.5019531 12.021484 L 7.5039062 12.021484 L 7.9882812 12.021484 L 7.9882812 10.992188 L 7.5039062 10.992188 L 6.5019531 10.992188 L 6.0175781 10.992188 z" transform="translate(4 4)"/>
+</svg>