Remove crates vscode extension dependency from devcontainer (#3132)

# Description
Devcontainer json definition file contains vscode extension dependency:
`crates` which is deprecated. As this extension is only an utility for
checking `Cargo.toml` dependency creates versions and is not needed for
devcontainer to work on our codebase, we decided to drop that extension
from our devcontainer json definition file.
Anyone can still use `crates` or similar extension (like `dependi`) in
devcontainer by installing it locally in vscode.
Reference discussion:
[link](https://cowservices.slack.com/archives/C0375NV72SC/p1731961303020439)

# Changes
Updated `devcontainer.json` file.

## How to test
Open vscode from `services` folder and on popup window click option
"Open in devcontainer" (docker daemon is required to operate). Wait for
containers setup and validation by rust analyzer.

.devcontainer/devcontainer.json

@@ -41,8 +41,7 @@
                 ]
             },
             "extensions": [
-                "rust-lang.rust-analyzer",
-                "serayuzgur.crates"
+                "rust-lang.rust-analyzer"
             ]
         }
     },