Zed update through "simplify seek index writer and CLI arg" by mccanne

This is an auto-generated commit with a Zed dependency update. The Zed PR
brimdata/super#2742, authored by @mccanne,
has been merged.

simplify seek index writer and CLI arg

This commit simplifies the seek index writer by moving the
logic for auto-stream-termination out of zngio and into
segment.Writer.  We also deleted the unused indexing code
in zngio along with the "zed index seek" command and related
support.

As previously agreed among the team, the streamax argument
to zed lake add and zed lake load was changed to seekstride
and the units changed from records to bytes.

Closes brimdata/super#2542

package.json

@@ -155,7 +155,7 @@
     "tee-1": "^0.2.0",
     "tree-model": "^1.0.7",
     "valid-url": "^1.0.9",
-    "zed": "git+https://github.com/brimdata/zed.git#7f2de518631fe403f733ce3f210a971c3ec35341"
+    "zed": "git+https://github.com/brimdata/zed.git#58dbccc8fb1fb06523f3a98d2c4e86fc7d8df271"
   },
   "optionalDependencies": {
     "electron-installer-debian": "^3.0.0",