Fix rust docs deploy (#2615)

<!--
Open the PR up as a draft until you feel it is ready for a proper
review.

Do not make PR:s from your own `main` branch, as that makes it difficult
for reviewers to add their own fixes.

Add any improvements to the branch as new commits to make it easier for
reviewers to follow the progress. All commits will be squashed to a
single commit once the PR is merged into `main`.

Make sure you mention any issues that this PR closes in the description,
as well as any other related issues.

To get an auto-generated PR description you can put "copilot:summary" or
"copilot:walkthrough" anywhere.
-->

### What

Remove the `/target/doc` directory before building and deploying docs.
This should fix the rust docs deploy issue, but it will be unconfirmed
until we merge into main

Also removes the `files.exclude` vscode setting for already gitignored
directories. I keep having to dig into target dirs and/or the venv and
it's pretty annoying to keep this change around locally inbetween all
the git checkouts. I don't see why we need it in the first place, it
just removes the files from the explorer pane. That makes it a bit
shorter, but not by a lot.

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)
* [x] I have tested [demo.rerun.io](https://demo.rerun.io/pr/2615) (if
applicable)

- [PR Build Summary](https://build.rerun.io/pr/2615)
- [Docs
preview](https://rerun.io/preview/pr%3Ajan%2Ffix-deploy-docs/docs)
- [Examples
preview](https://rerun.io/preview/pr%3Ajan%2Ffix-deploy-docs/examples)

.github/workflows/reusable_deploy_docs.yml

@@ -1,4 +1,4 @@
-name: 'Reusable Deploy Docs'
+name: "Reusable Deploy Docs"
 
 on:
   workflow_call:
@@ -33,8 +33,7 @@ env:
   RUSTC_WRAPPER: "sccache"
 
 jobs:
-
-# ---------------------------------------------------------------------------
+  # ---------------------------------------------------------------------------
 
   py-deploy-docs:
     name: Python
@@ -90,8 +89,7 @@ jobs:
           git commit -m "Update docs for ${GITHUB_SHA}"
           git push origin gh-pages-orphan:gh-pages -f
 
-
-# ---------------------------------------------------------------------------
+  # ---------------------------------------------------------------------------
 
   rs-deploy-docs:
     name: Rust
@@ -129,6 +127,9 @@ jobs:
       - name: Run sccache-cache
         uses: mozilla-actions/sccache-action@v0.0.3
 
+      - name: Delete existing /target/doc
+        run: rm -rf ./target/doc
+
       - name: cargo doc --document-private-items
         uses: actions-rs/cargo@v1
         with:
@@ -156,3 +157,4 @@ jobs:
         run: |
           git fetch
           python3 -m ghp_import -n -p -x docs/rust/head target/doc/ -m "Update the rust docs"
+