[fuchsia] Fix remaining per-file OWNERS entries to apply to subdirectories

Asterisk ('*') does not match strings that include slashes. Replace such
instances for platform-specific owners with "...".

There were some instances of '*' that really did intend to apply to
files in the current directory or only applied to a single directory.
* //net/base/OWNERS is unchanged
* The entry in //third_party/blink/tools/OWNERS has been moved to a
  subdirectory.

Also removes a non-committer from //skia/OWNERS.

Bug: 1244995
Change-Id: Ife57feee67522d435c80bc545e7a5b16c4a66431
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3151419
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Sean Topping <seantopping@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Will Cassella <cassew@google.com>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Auto-Submit: David Dorwin <ddorwin@chromium.org>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Cr-Commit-Position: refs/heads/main@{#921223}

diff --git a/media/OWNERS b/media/OWNERS
index 7a377c6..262c8c22 100644
--- a/media/OWNERS
+++ b/media/OWNERS

@@ -22,7 +22,7 @@
 xhwang@chromium.org
 
 # For Fuchsia-specific changes:
-per-file *_fuchsia*=file://build/fuchsia/OWNERS
+per-file ..._fuchsia*=file://build/fuchsia/OWNERS
 
 # For GpuMemoryBuffer-related changes:
 per-file *gpu_memory_buffer*=dcastagna@chromium.org