Add 'info' icon with no background

We currently have an info icon but this CL adds a variant which doesn't
have a background.

See:
https://imgur.com/a/sWlyxRL (new)

and

https://imgur.com/a/ZhucjOE

Bug: none
Change-Id: I1bc746eb7f765d080e48f7b31dcec08694555af5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3350848
Auto-Submit: Andres Olivares <andoli@chromium.org>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Andres Olivares <andoli@chromium.org>

config/gni/devtools_grd_files.gni

@@ -93,6 +93,7 @@ grd_files_release_sources = [
   "front_end/Images/ic_suggest_color.svg",
   "front_end/Images/ic_undo_16x16_icon.svg",
   "front_end/Images/ic_warning_black_18dp.svg",
+  "front_end/Images/info-icon.svg",
   "front_end/Images/issue-cross-icon.svg",
   "front_end/Images/issue-exclamation-icon.svg",
   "front_end/Images/issue-questionmark-icon.svg",

config/gni/devtools_image_files.gni

@@ -103,6 +103,7 @@ devtools_svg_sources = [
   "ic_suggest_color.svg",
   "ic_undo_16x16_icon.svg",
   "ic_warning_black_18dp.svg",
+  "info-icon.svg",
   "issue-cross-icon.svg",
   "issue-exclamation-icon.svg",
   "issue-questionmark-icon.svg",

front_end/Images/src/info-icon.svg

@@ -0,0 +1 @@
+<svg width="11" height="12" fill="none" xmlns="http://www.w3.org/2000/svg"><circle cx="5.5" cy="6" r="5" stroke="#202124"/><path fill="#202124" d="M5 4.5h1v5H5zM5 2.5h1v1H5z"/></svg>