[OpenMP][Docs] Update 'loop' directive status in OpenMP support.

[ddpagan]

Summary

Update status of #pragma omp loop (directive) and loop bind.

[ddpagan]

https://github.com/llvm/llvm-project/commit/b41bf9d8576f44e30726e42d31f760032c08333d

clang/docs/OpenMPSupport.rst

 information or if you want to help with the
 implementation.
 
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 |Category                      | Feature                                                      | Status                   | Reviews                                                               |
 +==============================+==============================================================+==========================+=======================================================================+
 | loop                         | support != in the canonical loop form                        | :good:`done`             | D54441                                                                |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop                         | #pragma omp loop (directive)                                 | :part:`worked on`        |                                                                       |
+| loop                         | #pragma omp loop (directive)                                 | :part:`partial`          | D145823 (combined forms)                                              |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop                         | #pragma omp loop bind                                        | :part:`worked on`        |                                                                       |
+| loop                         | #pragma omp loop bind                                        | :part:`worked on`        | D144634 (needs review)                                                |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | loop                         | collapse imperfectly nested loop                             | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | loop                         | collapse non-rectangular nested loop                         | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | loop                         | C++ range-base for loop                                      | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | loop                         | clause: if for SIMD directives                               | :good:`done`             |                                                                       |