[CBRD-22783] Add support for REGEXP_REPLACE function

[hgryoo]

http://jira.cubrid.org/browse/CBRD-22783

REGEXP_REPLACE function
REGEXP_REPLACE (src, pattern, repl [, position [,occurrence [, match_type]]])

replaces occurrences in the string src that matches the regular expression pattern with the replacement string repl, and returns the result string.

Optional arguments:

• position: the position in src to start the search. If omitted, the default value is 1.
• occurrence: the occurrence of a match to replace. If omitted, the default value is 0 (which means match all).
• match_type: A string to configure the behavior of matching
  • c: Case sensitive matching.
  • i: Case insensitive matching.

If any of the arguments is NULL, the return value is NULL.

Examples

SELECT REGEXP_REPLACE ('TechOnTheNet', 'a|e|i|o|u', '#', 3, 2, 'c');

=== <Result of SELECT Command in Line 1> ===

  regexp_replace('TechOnTheNet', 'a|e|i|o|u', '#', 3, 2, 'c')
======================
  'TechOnTheN#t'

1 row selected. (0.011526 sec) Committed.

SELECT REGEXP_REPLACE (name, '\w', '#') from athlete LIMIT 5;

=== <Result of SELECT Command in Line 2> ===

  regexp_replace(name, '\w', '#')
======================
  '######### #####'
  '######### #####'
  '######### ######'
  '######### ####'
  '######### ### ####'

5 rows selected. (0.017418 sec) Committed.

1 command(s) successfully processed.

This PR should be merged after #1509. To review this PR, the first commit for REGEXP_REPLACE starts from b55afda

[cubridci]

Build comment file:

File: src/query/query_executor.c (1 incorrect indentation(s) found)

  1758 	    /* free memory of compiled regex */

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Please run 'indent -l120 -lc120' to correct the indentation

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