chore: remove unnecessary clone of workspace (#3770)

# Description

## Problem\*

Resolves <!-- Link to GitHub Issue -->

## Summary\*



## Additional Context



## Documentation\*

Check one:
- [ ] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [ ] I have tested the changes locally.
- [ ] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

tooling/nargo_toml/src/lib.rs

@@ -411,7 +411,7 @@ pub fn resolve_workspace_from_toml(
     let nargo_toml = read_toml(toml_path)?;
     let workspace = toml_to_workspace(nargo_toml, package_selection)?;
     if let Some(current_compiler_version) = current_compiler_version {
-        semver::semver_check_workspace(workspace.clone(), current_compiler_version)?;
+        semver::semver_check_workspace(&workspace, current_compiler_version)?;
     }
     Ok(workspace)
 }

tooling/nargo_toml/src/semver.rs

@@ -12,7 +12,7 @@ pub(crate) fn parse_semver_compatible_version(version: &str) -> Result<Version,
 
 // Check that all of the packages in the workspace are compatible with the current compiler version
 pub(crate) fn semver_check_workspace(
-    workspace: Workspace,
+    workspace: &Workspace,
     current_compiler_version: String,
 ) -> Result<(), ManifestError> {
     let version = parse_semver_compatible_version(&current_compiler_version)