Fix alignment errors caused by dynamically allocating over-aligned types. Some types inherit libbson's over-alignment of bson_t and bson_iter_t.

Original report: Build failing for EPEL-10 (segfault in tests)

Probably only for your information, seems very strange

Only on x86_64 and only in EPEL-10

The following tests FAILED:
      1 - mongocrypt (SEGFAULT)
      6 - example-state-machine (SEGFAULT)
      7 - example-state-machine-static (SEGFAULT)

From GDB

$ gdb ./redhat-linux-build/example-state-machine-static
(gdb) run
0x0000555555558e5d in mongocrypt_ctx_encrypt_init (db=0x5555555aa441 "test", db_len=-1, ctx=0x55555569fc30, cmd=0x5555556a0500)
    at /home/remi/rpmbuild/BUILD/libmongocrypt-1.11.0/src/mongocrypt-ctx-encrypt.c:2893
2893        ctx->vtable.mongo_db_collinfo = _mongo_db_collinfo;
(gdb) bt
#0  0x0000555555558e5d in mongocrypt_ctx_encrypt_init (db=0x5555555aa441 "test", db_len=-1, ctx=0x55555569fc30, cmd=0x5555556a0500)
    at /home/remi/rpmbuild/BUILD/libmongocrypt-1.11.0/src/mongocrypt-ctx-encrypt.c:2893
#1  main () at /home/remi/rpmbuild/BUILD/libmongocrypt-1.11.0/test/example-state-machine.c:273

I don't see anything wrong in source

So looks like a build chain issue, will try to dig on this