use the `required` instruction to determine if the environment fits the sample code's required. (#32766)

* add unittests

* add find_last_future_line_end

* extract_code_blocks_from_docstr and its testcases

* test_codeblock_before_examples_is_ignored

* sampcd_extract_to_file 拆为两步

* update the codeblock element's format

* code-block directive has no value options

* insert the CODES_INTERTED_INTO_FRONTEND

* using the new func insert_codes_into_codeblock

* get_test_capacity and is_required_match

* using the new funcitons in sampcd_extract_to_file

* add some comments and refactor functions

* using logger instead of all the print

* remote wlist

* collect summary info, and print them

* call get capacity

* update summary format

* print the apis that don't have sample codes.

* print the samples the consumed time more than 10s.

print time

* update unittest testcases

* solve ResourceWarning: unclosed file

* run tools test seperately

* python2 does not have nonlocal keyword, using dict variable instead

* remove unused import, rearrange a series of conditional statements.

* remove wlist.json and its check approval

* remove wlist.json and its check approval