Pregenerate json files for each contained plugins docstring during build

[cidrblock]

Currently the ansible language server crawls the file systems and uses a regular expression to extract doc strings from plugins.

In the case of execution environments, having ansible builder extract the doc strings during the build process and store them in the container in a well-known location would allow this to be a one-time process vs. a process that occurred each time the language server was started.

This would limit the interaction between the language server and the EE to a simple file content collection process, eg cat *

This is the current process the language server uses: https://github.com/ansible/ansible-language-server/blob/707d53c64a29571922a7924cf4e5ff9b6ad4b68e/src/utils/docsParser.ts#L202

[cidrblock]

Note: This may not be needed for the initial EE support being added to the ansible language server for it's fall release.

Will confirm......

[cidrblock]

Confirm, not needed for the fall release of the language server and vscode plugin