Modules: Add remaining list API functions (#8439)

List functions operating on elements by index:

* RM_ListGet
* RM_ListSet
* RM_ListInsert
* RM_ListDelete

Iteration is done using a simple for loop over indices.
The index based functions use an internal iterator as an optimization.
This is explained in the docs:

```
 * Many of the list functions access elements by index. Since a list is in
 * essence a doubly-linked list, accessing elements by index is generally an
 * O(N) operation. However, if elements are accessed sequentially or with
 * indices close together, the functions are optimized to seek the index from
 * the previous index, rather than seeking from the ends of the list.
 *
 * This enables iteration to be done efficiently using a simple for loop:
 *
 *     long n = RM_ValueLength(key);
 *     for (long i = 0; i < n; i++) {
 *         RedisModuleString *elem = RedisModule_ListGet(key, i);
 *         // Do stuff...
 *     }
```

1 files changed, 1 insertions, 0 deletions

diff --git a/runtest-moduleapi b/runtest-moduleapi
index f9dbcce61..2dc835a84 100755
--- a/runtest-moduleapi
+++ b/runtest-moduleapi
@@ -36,6 +36,7 @@ $TCLSH tests/test_helper.tcl \
 --single unit/moduleapi/defrag \
 --single unit/moduleapi/hash \
 --single unit/moduleapi/zset \
+--single unit/moduleapi/list \
 --single unit/moduleapi/stream \
 --single unit/moduleapi/datatype2 \
 "${@}"