set UV_LINK_MODE=copy for all uv pip install commands in codeserver/ubi9-python-3.12 Dockerfile

fix ownership path in `codeserver/ubi9-python-3.12` Dockerfile for consistency

```
warning: Failed to hardlink files; falling back to full copy. This may lead to degraded performance.
         If the cache and target directories are on different filesystems, hardlinking may not be supported.
         If this is intentional, set `export UV_LINK_MODE=copy` or use `--link-mode=copy` to suppress this warning.
```

Author: jiridanek

codeserver/ubi9-python-3.12/Dockerfile.cpu

@@ -51,7 +51,7 @@ RUN --mount=type=cache,target=/root/.cache/uv \
     source ./devel_env_setup.sh && \
     # This may have to download and compile some dependencies, and as we don't lock requirements from `build-system.requires`,
     #  we often don't know the correct hashes and `--require-hashes` would therefore fail on non amd64, where building is common.
-    uv pip install --strict --no-deps --refresh --no-config --no-progress --verify-hashes --compile-bytecode --index-strategy=unsafe-best-match --requirements=./pylock.toml
+    UV_LINK_MODE=copy uv pip install --strict --no-deps --refresh --no-config --no-progress --verify-hashes --compile-bytecode --index-strategy=unsafe-best-match --requirements=./pylock.toml
 
 # dummy file to make image build wait for this stage
 RUN touch /tmp/control
@@ -231,10 +231,10 @@ RUN --mount=type=cache,target=/root/.cache/uv \
     echo "Installing softwares and packages" && \
     # we can ensure wheels are consumed from the cache only by restricting internet access for uv install with '--offline' flag
     # TODO(jdanek): seen some builds fail on GitHub Actions with --offline and see no need to limit ourselves to the cache, will remove this
-    uv pip install --cache-dir /root/.cache/uv --requirements=./pylock.toml && \
+    UV_LINK_MODE=copy uv pip install --cache-dir /root/.cache/uv --requirements=./pylock.toml && \
     # Note: debugpy wheel availabe on pypi (in uv cache) is none-any but bundles amd64.so files
     #       Build debugpy from source instead
-    uv pip install --no-cache git+https://github.com/microsoft/debugpy.git@v$(grep -A1 '\"debugpy\"' ./pylock.toml | grep -Eo '\b[0-9\.]+\b') && \
+    UV_LINK_MODE=copy uv pip install --no-cache git+https://github.com/microsoft/debugpy.git@v$(grep -A1 '\"debugpy\"' ./pylock.toml | grep -Eo '\b[0-9\.]+\b') && \
     # change ownership to default user (all packages were installed as root and has root:root ownership \
     chown -R 1001:0 /opt/app-root