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-location.svg

@@ -1 +1 @@
-<svg viewBox="0 0 12 16" class="svg octicon-location" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M6 0C2.69 0 0 2.5 0 5.5 0 10.02 6 16 6 16s6-5.98 6-10.5C12 2.5 9.31 0 6 0zm0 14.55C4.14 12.52 1 8.44 1 5.5 1 3.02 3.25 1 6 1c1.34 0 2.61.48 3.56 1.36.92.86 1.44 1.97 1.44 3.14 0 2.94-3.14 7.02-5 9.05zM8 5.5c0 1.11-.89 2-2 2-1.11 0-2-.89-2-2 0-1.11.89-2 2-2 1.11 0 2 .89 2 2z"/></svg>
+<svg viewBox="0 0 16 16" class="svg octicon-location" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M11.536 3.464a5 5 0 010 7.072L8 14.07l-3.536-3.535a5 5 0 117.072-7.072v.001zm1.06 8.132a6.5 6.5 0 10-9.192 0l3.535 3.536a1.5 1.5 0 002.122 0l3.535-3.536zM8 9a2 2 0 100-4 2 2 0 000 4z"/></svg>