This commit fixes `deno task` by checking if the provided
task name actually has a wildcard char ("*").
Previously, if the "--recursive" flag was passed, the task name
was treated as a regex, which lead to a situation where exact task
name resulted in a regex that matched all tasks with the specific
prefix.
This commit fixes it, by checking if the provided task name, is an exact
name, or is it a wildcard match.
Closes https://github.com/denoland/deno/issues/27370
Closes https://github.com/denoland/deno/issues/27401
Closes https://github.com/denoland/deno/issues/27408
