[3.12] gh-100061: Proper fix of the bug in the matching of possessive quantifiers (GH-102612) (#108003)

Restore the global Input Stream pointer after trying to match a sub-pattern.

.
(cherry picked from commit abd9cc52d9)

Co-authored-by: SKO <41810398+uyw4687@users.noreply.github.com>

Modules/_sre/sre_lib.h

@@ -1334,6 +1334,10 @@ SRE(match)(SRE_STATE* state, const SRE_CODE* pattern, int toplevel)
                     MARK_POP(ctx->lastmark);
                     LASTMARK_RESTORE();
 
+                    /* Restore the global Input Stream pointer
+                       since it can change after jumps. */
+                    state->ptr = ptr;
+
                     /* We have sufficient matches, so exit loop. */
                     break;
                 }