Bug #77460 Remove old-style MAX_STATEMENT_TIME hint (replace with MAX_EXECUTION_TIME)

Description:
The old-style MAX_STATEMENT_TIME hint has been reimplemented by the new-style MAX_EXECUTION_TIME one.
It would be nice to cleanup the code by removing references to the old-style MAX_STATEMENT_TIME hint, at least to eliminate 4 shift/reduce conflicts in the parser.

How to repeat:
N/A

Noted in 5.7.8 changelog.

The MAX_STATEMENT_TIME option for SELECT statements was removed
because its functionality is now available using the more general
optimizer hint syntax (see ). Statements that begin like this:

SELECT MAX_STATEMENT_TIME = N ...
      
Should be rewritten to begin like this:

SELECT /*+ MAX_EXECUTION_TIME(N) */ ...

There are some minor implementation differences between the two.
MAX_STATEMENT_TIME was not permitted in non-top-level SELECT
statements such as subqueries, or in stored programs, and produced an
error. MAX_EXECUTION_TIME() is permitted in those contexts, but is
ignored.

Bug#72540 was marked as a duplicate.