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ARROW-11988: [C++][Gandiva] Implements last_day function

Implements the `last_day` function inside the Gandiva. The function gets a timestamp and returns the date of the last day of the month defined in timestamp.

JIRA issue: https://issues.apache.org/jira/browse/ARROW-11988

Closes #9727 from anthonylouisbsb/feature/add-last-day-function and squashes the following commits:

9f22dc3ca <Anthony Louis> Fix problems with formatter
3cdb3c534 <Anthony Louis> Fix linter warnings about the line length
95bb36e6f <Anthony Louis> Fix identation for code
21b504f0a <Anthony Louis> Fix integration tests for last day function
7abc05e87 <Anthony Louis> Add integration test for last day function
e017ceb5e <Anthony Louis> Add functions to retrieve last day inside the registry
c87e24837 <Anthony Louis> Add macro for last_day func
3be2982f0 <Anthony Louis> Add unit test for the las day method
9dbb50192 <Anthony Louis> Create method to retrieve last time for timestamp

Authored-by: Anthony Louis <anthony@simbioseventures.com>
Signed-off-by: Praveen <praveen@dremio.com>