perf hists browser: Reorder variables to reduce padding

Address clang-tidy warning:
```
tools/perf/ui/browsers/hists.c:2416:8: warning: Excessive padding in 'struct popup_action' (8 padding bytes, where 0 is optimal).
Optimal fields order:
time,
thread,
evsel,
fn,
ms,
socket,
rstype,
```
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: llvm@lists.linux.dev
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Tom Rix <trix@redhat.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20231009183920.200859-12-irogers@google.comSigned-off-by: Namhyung Kim <namhyung@kernel.org>

tools/perf/ui/browsers/hists.c

@@ -2416,12 +2416,12 @@ static int switch_data_file(void)
 struct popup_action {
 	unsigned long		time;
 	struct thread 		*thread;
+	struct evsel	*evsel;
+	int (*fn)(struct hist_browser *browser, struct popup_action *act);
 	struct map_symbol 	ms;
 	int			socket;
-	struct evsel	*evsel;
 	enum rstype		rstype;
 
-	int (*fn)(struct hist_browser *browser, struct popup_action *act);
 };
 
 static int