CTL - setting values by handle

Rationale

This issue will be discussed and summarized in the implementation for the by_handle part of the CTL.
This issue is a part of: #1036

Description

The CTL for a handle is the way to set values for a specific pool or provider.

"umf.pool.by_handle.disjoint.MaxPoolableSize"

API Changes

The current API should be unchanged.

Examples of use

// Current
ctl_query(global_tree, pointer_to_pool, CTL_QUERY_PROGRAMMATIC, "umf.pool.by_handle.disjoint.MaxPoolableSize", CTL_QUERY_READ, &value);
// Desired
umfCtlGet("umf.pool.by_handle.disjoint.MaxPoolableSize", pointer_to_pool, &value);

Implementation details

The current approach assumes a handle to a pool or a provider will be passed as context. Because of the lack of support for params in the name like %p, %s, or {} it should be determined using a new type of leaf or node.

The implementation should be split into 2 parts, first is the main CTL tree:

umf
├── pool
|   └── by_handle
|       └── SUB_TREE (aka NAME)
└── provider
    └── by_handle
        └── SUB_TREE (aka NAME)

After encountering SUB_TREE there should be located a proper CTL tree, appropriate for the mentioned type:

disjoint sub-tree
├── SlabMinSize (size_t)
├── MaxPoolableSize (size_t)
├── Capacity (size_t)
├── MinBucketSize (size_t)
├── CurPoolSize (size_t)
├── PoolTrace (int)
└── Name (char *)

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