Use [N] in lieu of exact prune counts (#8992)

## Summary

These can seemingly vary.

crates/uv/tests/it/cache_prune.rs

@@ -23,7 +23,13 @@ fn prune_no_op() -> Result<()> {
         .assert()
         .success();
 
-    uv_snapshot!(context.filters(), context.prune().arg("--verbose"), @r###"
+    let filters: Vec<_> = context
+        .filters()
+        .into_iter()
+        .chain(std::iter::once((r"Removed \d+ files", "Removed [N] files")))
+        .collect();
+
+    uv_snapshot!(&filters, context.prune().arg("--verbose"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -56,7 +62,13 @@ fn prune_stale_directory() -> Result<()> {
     let simple = context.cache_dir.child("simple-v4");
     simple.create_dir_all()?;
 
-    uv_snapshot!(context.filters(), context.prune().arg("--verbose"), @r###"
+    let filters: Vec<_> = context
+        .filters()
+        .into_iter()
+        .chain(std::iter::once((r"Removed \d+ files", "Removed [N] files")))
+        .collect();
+
+    uv_snapshot!(&filters, context.prune().arg("--verbose"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -78,7 +90,13 @@ fn prune_cached_env() {
     let tool_dir = context.temp_dir.child("tools");
     let bin_dir = context.temp_dir.child("bin");
 
-    uv_snapshot!(context.filters(), context.tool_run()
+    let filters: Vec<_> = context
+        .filters()
+        .into_iter()
+        .chain(std::iter::once((r"Removed \d+ files", "Removed [N] files")))
+        .collect();
+
+    uv_snapshot!(&filters, context.tool_run()
         .arg("[email protected]")
         .arg("--version")
         .env(EnvVars::UV_TOOL_DIR, tool_dir.as_os_str())
@@ -181,8 +199,12 @@ fn prune_unzipped() -> Result<()> {
         iniconfig
     " })?;
 
+    let filters: Vec<_> = std::iter::once((r"Removed \d+ files", "Removed [N] files"))
+        .chain(context.filters())
+        .collect();
+
     // Install a requirement, to populate the cache.
-    uv_snapshot!(context.filters(), context.pip_install().arg("-r").env_remove(EnvVars::UV_EXCLUDE_NEWER).arg("requirements.txt").arg("--reinstall"), @r###"
+    uv_snapshot!(&filters, context.pip_install().arg("-r").env_remove(EnvVars::UV_EXCLUDE_NEWER).arg("requirements.txt").arg("--reinstall"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -195,14 +217,14 @@ fn prune_unzipped() -> Result<()> {
      + source-distribution==0.0.1
     "###);
 
-    uv_snapshot!(context.filters(), context.prune().arg("--ci"), @r###"
+    uv_snapshot!(&filters, context.prune().arg("--ci"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
 
     ----- stderr -----
     Pruning cache at: [CACHE_DIR]/
-    Removed 169 files ([SIZE])
+    Removed [N] files ([SIZE])
     "###);
 
     context.venv().assert().success();
@@ -212,7 +234,7 @@ fn prune_unzipped() -> Result<()> {
     requirements_txt.write_str(indoc! { r"
         source-distribution==0.0.1
     " })?;
-    uv_snapshot!(context.filters(), context.pip_install().arg("-r").env_remove(EnvVars::UV_EXCLUDE_NEWER).arg("requirements.txt").arg("--offline"), @r###"
+    uv_snapshot!(&filters, context.pip_install().arg("-r").env_remove(EnvVars::UV_EXCLUDE_NEWER).arg("requirements.txt").arg("--offline"), @r###"
     success: true
     exit_code: 0
     ----- stdout -----
@@ -228,7 +250,7 @@ fn prune_unzipped() -> Result<()> {
     requirements_txt.write_str(indoc! { r"
         iniconfig
     " })?;
-    uv_snapshot!(context.filters(), context.pip_install().arg("-r").env_remove(EnvVars::UV_EXCLUDE_NEWER).arg("requirements.txt").arg("--offline"), @r###"
+    uv_snapshot!(&filters, context.pip_install().arg("-r").env_remove(EnvVars::UV_EXCLUDE_NEWER).arg("requirements.txt").arg("--offline"), @r###"
     success: false
     exit_code: 1
     ----- stdout -----
@@ -275,8 +297,14 @@ fn prune_stale_revision() -> Result<()> {
     context.temp_dir.child("src").child("__init__.py").touch()?;
     context.temp_dir.child("README").touch()?;
 
+    let filters: Vec<_> = context
+        .filters()
+        .into_iter()
+        .chain(std::iter::once((r"Removed \d+ files", "Removed [N] files")))
+        .collect();
+
     // Install the same package twice, with `--reinstall`.
-    uv_snapshot!(context.filters(), context
+    uv_snapshot!(&filters, context
         .pip_install()
         .arg(".")
         .arg("--reinstall"), @r###"
@@ -291,7 +319,7 @@ fn prune_stale_revision() -> Result<()> {
      + project==0.1.0 (from file://[TEMP_DIR]/)
     "###);
 
-    uv_snapshot!(context.filters(), context
+    uv_snapshot!(&filters, context
         .pip_install()
         .arg(".")
         .arg("--reinstall"), @r###"
@@ -307,8 +335,7 @@ fn prune_stale_revision() -> Result<()> {
      ~ project==0.1.0 (from file://[TEMP_DIR]/)
     "###);
 
-    let filters: Vec<_> = context
-        .filters()
+    let filters: Vec<_> = filters
         .into_iter()
         .chain([
             // The cache entry does not have a stable key, so we filter it out
@@ -330,11 +357,11 @@ fn prune_stale_revision() -> Result<()> {
     Pruning cache at: [CACHE_DIR]/
     DEBUG Removing dangling source revision: [CACHE_DIR]/sdists-v6/[ENTRY]
     DEBUG Removing dangling cache archive: [CACHE_DIR]/archive-v0/[ENTRY]
-    Removed 8 files ([SIZE])
+    Removed [N] files ([SIZE])
     "###);
 
     // Uninstall and reinstall the package. We should use the cached version.
-    uv_snapshot!(context.filters(), context
+    uv_snapshot!(&filters, context
         .pip_uninstall()
         .arg("."), @r###"
     success: true
@@ -346,7 +373,7 @@ fn prune_stale_revision() -> Result<()> {
      - project==0.1.0 (from file://[TEMP_DIR]/)
     "###);
 
-    uv_snapshot!(context.filters(), context
+    uv_snapshot!(&filters, context
         .pip_install()
         .arg("."), @r###"
     success: true