collab: Remove dependency on X11 (#19079)

collab: Remove dependency on X11

I'm not sure if this is the best solution (perhaps pulling
`LanguageName` into a separate `language_types` crate would be
better...?) - but it massively reduces build time / dependencies / size
and means that the collab server no longer requires X11 libraries to be
installed.

tl;dr: `telemetry_events` requires the `language` crate, and the
language crate requires a whole ton of extra stuff. Since
telemetry_events only uses `language` for a single type definition
(`LanguageName`, aka `String`), we can cut all of these out by using the
base `String` type (This doesn't seem too terrible, given that all other
telemetry fields are using basic datatypes like String as opposed to
more strongly-typed variants).


FYI the dependency tree for "why does collab need X11 libraries??" looks
like this:

```
collab
 \- telemetry_events
     \- language
         |- gpui
         |- fuzzy
         |   \- gpui
         |- git
         |   \- gpui
         |- lsp
         |   |- gpui
         |   \- release_channel
         |       \- gpui
         |- settings
         |   |- fs
         |   |   \- gpui
         |   \- gpui
         |- task
         |   \- gpui
         \- theme
             \- gpui
```

Release Notes:

- N/A

Dockerfile-collab

@@ -13,30 +13,9 @@ ARG GITHUB_SHA
 
 ENV GITHUB_SHA=$GITHUB_SHA
 
-# At some point in the past 3 weeks, additional dependencies on `xkbcommon` and
-# `xkbcommon-x11` were introduced into collab.
-#
-# A `git bisect` points to this commit as being the culprit: `b8e6098f60e5dabe98fe8281f993858dacc04a55`.
-#
-# Now when we try to build collab for the Docker image, it fails with the following
-# error:
-#
-# ```
-# 985.3   = note: /usr/bin/ld: cannot find -lxkbcommon: No such file or directory
-# 985.3           /usr/bin/ld: cannot find -lxkbcommon-x11: No such file or directory
-# 985.3           collect2: error: ld returned 1 exit status
-# ```
-#
-# The last successful deploys were at:
-# - Staging: `4f408ec65a3867278322a189b4eb20f1ab51f508`
-# - Production: `fc4c533d0a8c489e5636a4249d2b52a80039fbd7`
-#
 # Also add `cmake`, since we need it to build `wasmtime`.
-#
-# Installing these as a temporary workaround, but I think ideally we'd want to figure
-# out what caused them to be included in the first place.
 RUN apt-get update; \
-    apt-get install -y --no-install-recommends libxkbcommon-dev libxkbcommon-x11-dev cmake
+    apt-get install -y --no-install-recommends cmake
 
 RUN --mount=type=cache,target=./script/node_modules \
     --mount=type=cache,target=/usr/local/cargo/registry \