DRIVERS-3345 Ensure that not specifying the name and type when creating a search index will result in the name being "default" and the type being "search"

[qingyang-hu]

DRIVERS-3345

Add a prose test case to ensure that not specifying the name and type when creating a search index will result in the name being "default" and the type being "search"

Please complete the following before merging:

• Is the relevant DRIVERS ticket in the PR title?

• Update changelog.
• Test changes in at least one language driver.
• Test these changes against all server versions and topologies (including standalone, replica set, and sharded
  clusters).