Fix regex for PathBuf

According to logic in #120557 (comment)
the capture groups may be unnecessary and could possibly go with something
as simple as `std::path::PathBuf` as done in CodeLLDB:
https://github.com/vadimcn/codelldb/blob/05502bf75e4e7878a99b0bf0a7a81bba2922cbe3/formatters/rust.py#L59C56-L59C74

However for consistency will follow the pattern for now and consider updating all of regexes in a future PR.

Author: n8henrie

src/etc/lldb_commands

@@ -16,6 +16,6 @@ type summary add -F lldb_lookup.summary_lookup  -e -x -h "^(core::([a-z_]+::)+)R
 type summary add -F lldb_lookup.summary_lookup  -e -x -h "^(core::([a-z_]+::)+)RefMut<.+>$" --category Rust
 type summary add -F lldb_lookup.summary_lookup  -e -x -h "^(core::([a-z_]+::)+)RefCell<.+>$" --category Rust
 type summary add -F lldb_lookup.summary_lookup  -e -x -h "^core::num::([a-z_]+::)*NonZero.+$" --category Rust
-type summary add -F lldb_lookup.summary_lookup  -e -x -h "^std::path::PathBuf$" --category Rust
 type summary add -F lldb_lookup.summary_lookup  -e -x -h "^&(mut )?std::path::Path$" --category Rust
+type summary add -F lldb_lookup.summary_lookup  -e -x -h "^(std::([a-z_]+::)+)PathBuf$" --category Rust
 type category enable Rust

src/etc/rust_types.py

@@ -53,8 +53,8 @@ class RustType(object):
 STD_REF_MUT_REGEX = re.compile(r"^(core::(\w+::)+)RefMut<.+>$")
 STD_REF_CELL_REGEX = re.compile(r"^(core::(\w+::)+)RefCell<.+>$")
 STD_NONZERO_NUMBER_REGEX = re.compile(r"^core::num::([a-z_]+::)*NonZero.+$")
-STD_PATHBUF_REGEX = re.compile(r"^std::path::PathBuf$")
 STD_PATH_REGEX =  re.compile(r"^&(mut )?std::path::Path$")
+STD_PATHBUF_REGEX = re.compile(r"^(std::([a-z_]+::)+)PathBuf$")
 
 TUPLE_ITEM_REGEX = re.compile(r"__\d+$")
 

src/tools/compiletest/src/runtest.rs

@@ -1494,8 +1494,8 @@ impl<'test> TestCx<'test> {
             "^(core::([a-z_]+::)+)RefMut<.+>$",
             "^(core::([a-z_]+::)+)RefCell<.+>$",
             "^core::num::([a-z_]+::)*NonZero.+$",
-            "^std::path::PathBuf$",
             "^&(mut )?std::path::Path$",
+            "^(std::([a-z_]+::)+)PathBuf$",
         ];
 
         // In newer versions of lldb, persistent results (the `$N =` part at the start of