zebra: Set Free Functions for Traffic Control Hash Tables

Configure hash table cleanup with specific free functions for `zrouter.filter_hash`, `zrouter.qdisc_hash`, and `zrouter.class_hash`.
This ensures proper memory cleanup, addressing memory leaks.

The ASan leak log for reference:

```
***********************************************************************************
Address Sanitizer Error detected in tc_basic.test_tc_basic/r1.asan.zebra.15495

=================================================================
==15495==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 176 byte(s) in 1 object(s) allocated from:
    #0 0x7fd5660ffd28 in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xded28)
    #1 0x7fd565afe238 in qcalloc lib/memory.c:105
    #2 0x5564521c6c9e in tc_filter_alloc_intern zebra/zebra_tc.c:389
    #3 0x7fd565ac49e8 in hash_get lib/hash.c:147
    #4 0x5564521c7c74 in zebra_tc_filter_add zebra/zebra_tc.c:409
    #5 0x55645210755a in zread_tc_filter zebra/zapi_msg.c:3428
    #6 0x5564521127c1 in zserv_handle_commands zebra/zapi_msg.c:4004
    #7 0x5564522208b2 in zserv_process_messages zebra/zserv.c:520
    #8 0x7fd565b9e034 in event_call lib/event.c:1974
    #9 0x7fd565ae142b in frr_run lib/libfrr.c:1214
    #10 0x5564520c14b1 in main zebra/main.c:492
    #11 0x7fd564ec2c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7fd5660ffd28 in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xded28)
    #1 0x7fd565afe238 in qcalloc lib/memory.c:105
    #2 0x5564521c6c6e in tc_class_alloc_intern zebra/zebra_tc.c:239
    #3 0x7fd565ac49e8 in hash_get lib/hash.c:147
    #4 0x5564521c784f in zebra_tc_class_add zebra/zebra_tc.c:293
    #5 0x556452107ce5 in zread_tc_class zebra/zapi_msg.c:3315
    #6 0x5564521127c1 in zserv_handle_commands zebra/zapi_msg.c:4004
    #7 0x5564522208b2 in zserv_process_messages zebra/zserv.c:520
    #8 0x7fd565b9e034 in event_call lib/event.c:1974
    #9 0x7fd565ae142b in frr_run lib/libfrr.c:1214
    #10 0x5564520c14b1 in main zebra/main.c:492
    #11 0x7fd564ec2c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)

Direct leak of 12 byte(s) in 1 object(s) allocated from:
    #0 0x7fd5660ffd28 in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xded28)
    #1 0x7fd565afe238 in qcalloc lib/memory.c:105
    #2 0x5564521c6c3e in tc_qdisc_alloc_intern zebra/zebra_tc.c:128
    #3 0x7fd565ac49e8 in hash_get lib/hash.c:147
    #4 0x5564521c753b in zebra_tc_qdisc_install zebra/zebra_tc.c:184
    #5 0x556452108203 in zread_tc_qdisc zebra/zapi_msg.c:3286
    #6 0x5564521127c1 in zserv_handle_commands zebra/zapi_msg.c:4004
    #7 0x5564522208b2 in zserv_process_messages zebra/zserv.c:520
    #8 0x7fd565b9e034 in event_call lib/event.c:1974
    #9 0x7fd565ae142b in frr_run lib/libfrr.c:1214
    #10 0x5564520c14b1 in main zebra/main.c:492
    #11 0x7fd564ec2c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)

SUMMARY: AddressSanitizer: 228 byte(s) leaked in 3 allocation(s).
***********************************************************************************
```

Signed-off-by: Keelan Cannoo <keelan.cannoo@icloud.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/zebra/zebra_router.c b/zebra/zebra_router.c
index 676475355e..6271d029fb 100644
--- a/zebra/zebra_router.c
+++ b/zebra/zebra_router.c
@@ -241,9 +241,9 @@ void zebra_router_terminate(void)
 			    zebra_pbr_ipset_entry_free);
 	hash_clean_and_free(&zrouter.ipset_hash, zebra_pbr_ipset_free);
 	hash_clean_and_free(&zrouter.iptable_hash, zebra_pbr_iptable_free);
-	hash_clean_and_free(&zrouter.filter_hash, NULL);
-	hash_clean_and_free(&zrouter.qdisc_hash, NULL);
-	hash_clean_and_free(&zrouter.class_hash, NULL);
+	hash_clean_and_free(&zrouter.filter_hash, (void (*)(void *)) zebra_tc_filter_free);
+	hash_clean_and_free(&zrouter.qdisc_hash, (void (*)(void *)) zebra_tc_qdisc_free);
+	hash_clean_and_free(&zrouter.class_hash, (void (*)(void *)) zebra_tc_class_free);
 
 #ifdef HAVE_SCRIPTING
 	zebra_script_destroy();