Update Octicons to v10 (#12240)

* Update Octicons to v10

Besides a few renames, these icons are no longer present in v10 that we've
used, so had to change:

file-symlink-directory -> file-submodule
internal-repo -> repo
repo-force-push -> repo-push
repo-template-private -> repo-template

Fixes: https://github.com/go-gitea/gitea/issues/11889
Ref: https://github.com/primer/octicons/releases/tag/v10.0.0

* add custom sliders svg for removed octicon-settings

* apply suggestion

* fix triangles and use play on admin dashboard

* add custom mirror svg

* add missing build files

* unify custom svgs

* move to octicon-repo-clone to gitea-mirror

* use octicon-x on conflicts

* tweak timeline icons

* tweak comment buttons

* update settings icon to octicons v1

* switch to octicon-mirror and octicon-tools

* replace two wiki buttons with octicons

* remove whitespace in svg sources

* Fix filepath basename on Windows for SVG bindata (#12241)

* move octicons to devDependencies

* move back to dependencies

* move svgo to devDependencies again

Co-authored-by: Cirno the Strongest <1447794+CirnoT@users.noreply.github.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

public/img/svg/octicon-device-mobile.svg

@@ -1 +1 @@
-<svg viewBox="0 0 10 16" class="svg octicon-device-mobile" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M9 0H1C.45 0 0 .45 0 1v14c0 .55.45 1 1 1h8c.55 0 1-.45 1-1V1c0-.55-.45-1-1-1zM5 15.3c-.72 0-1.3-.58-1.3-1.3 0-.72.58-1.3 1.3-1.3.72 0 1.3.58 1.3 1.3 0 .72-.58 1.3-1.3 1.3zM9 12H1V2h8v10z"/></svg>
+<svg viewBox="0 0 16 16" class="svg octicon-device-mobile" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M3.75 0A1.75 1.75 0 002 1.75v12.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 14.25V1.75A1.75 1.75 0 0012.25 0h-8.5zM3.5 1.75a.25.25 0 01.25-.25h8.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25V1.75zM8 13a1 1 0 100-2 1 1 0 000 2z"/></svg>