Reinstall entrypoints with --force (#4697)

## Summary

I think this may have just been a typo.

Closes #4692.

## Test Plan

Run `cargo run tool install flask --force --reinstall` repeatedly.

crates/uv/src/commands/tool/install.rs

@@ -80,7 +80,7 @@ pub(crate) async fn install(
     let reinstall_entry_points = if existing_tool_receipt.is_some() {
         if force {
             debug!("Replacing existing tool due to `--force` flag.");
-            false
+            true
         } else {
             match settings.reinstall {
                 Reinstall::All => {

crates/uv/tests/tool_install.rs

@@ -629,6 +629,72 @@ fn tool_install_entry_point_exists() {
 
     tool_dir.child("black").assert(predicate::path::is_dir());
 
+    // Re-install `black` with `--force`
+    uv_snapshot!(context.filters(), context.tool_install()
+        .arg("black")
+        .arg("--force")
+        .env("UV_TOOL_DIR", tool_dir.as_os_str())
+        .env("XDG_BIN_HOME", bin_dir.as_os_str()), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv tool install` is experimental and may change without warning.
+    Resolved [N] packages in [TIME]
+    Installed [N] packages in [TIME]
+     + black==24.3.0
+     + click==8.1.7
+     + mypy-extensions==1.0.0
+     + packaging==24.0
+     + pathspec==0.12.1
+     + platformdirs==4.2.0
+    Installed: black, blackd
+    "###);
+
+    tool_dir.child("black").assert(predicate::path::is_dir());
+
+    // Re-install `black` without `--force`
+    uv_snapshot!(context.filters(), context.tool_install()
+        .arg("black")
+        .env("UV_TOOL_DIR", tool_dir.as_os_str())
+        .env("XDG_BIN_HOME", bin_dir.as_os_str()), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv tool install` is experimental and may change without warning.
+    Tool `black` is already installed
+    "###);
+
+    tool_dir.child("black").assert(predicate::path::is_dir());
+
+    // Re-install `black` with `--reinstall`
+    uv_snapshot!(context.filters(), context.tool_install()
+        .arg("black")
+        .arg("--reinstall")
+        .env("UV_TOOL_DIR", tool_dir.as_os_str())
+        .env("XDG_BIN_HOME", bin_dir.as_os_str()), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv tool install` is experimental and may change without warning.
+    Resolved [N] packages in [TIME]
+    Installed [N] packages in [TIME]
+     + black==24.3.0
+     + click==8.1.7
+     + mypy-extensions==1.0.0
+     + packaging==24.0
+     + pathspec==0.12.1
+     + platformdirs==4.2.0
+    Installed: black, blackd
+    "###);
+
+    tool_dir.child("black").assert(predicate::path::is_dir());
+
     insta::with_settings!({
         filters => context.filters(),
     }, {