memory/alloc: Use SCCalloc instead of malloc/memset

[jlucovsky]

Continuation of #9845

Replace SCMalloc/memset with SCCalloc

There are many places that use the following pattern:

     mem = SCMalloc(sizeof(foo));
     if (mem) {
        memset(&mem, 0, sizeof(foo));
    }

These can all be replaced by using SCCalloc which returns 0-filled memory.

Describe changes:

• Changed SCMalloc followed by memset to SCCalloc

Updates:

• Rebase
• Convert SCCalloc(1, element_count * sizeof(element)) to SCCalloc(element_count, sizeof(element))

Provide values to any of the below to override the defaults.

To use a pull request use a branch name like pr/N where N is the
pull request number.

Alternatively, SV_BRANCH may also be a link to an
OISF/suricata-verify pull-request.

SV_REPO=
SV_BRANCH=
SU_REPO=
SU_BRANCH=
LIBHTP_REPO=
LIBHTP_BRANCH=

[jlucovsky]

Continued in #9858