Delete m_locale in the pgm_base destructor instead of manual destroy method

We need the object in m_locale for a bit more things during program cleanup,
especially on macOS

The destructor of PGM_BASE is sufficient allowance of lifetime.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/17369

common/pgm_base.cpp

@@ -159,6 +159,9 @@ PGM_BASE::~PGM_BASE()
     }
 
     delete[] m_argvUtf8;
+
+    delete m_locale;
+    m_locale = nullptr;
 }
 
 
@@ -170,10 +173,6 @@ void PGM_BASE::Destroy()
     sentry_close();
 #endif
 
-    // unlike a normal destructor, this is designed to be called more than once safely:
-    delete m_locale;
-    m_locale = nullptr;
-
     m_pgm_checker.reset();
 }