fixes and features for the pg_hba module

[toydarian]

SUMMARY

• Adding myself to the CODEOWNERS file for the parts related to postgresql_pg_hba
• Deprecates keep_comments_at_rules as discussed in The keep_comments_at_rules option of postgresql_pg_hba breaks idempotency #776
• Adds parameter sort_rules that allows to disable sorting of rules. The default is true to keep to previous behavior
• Allows a file to contain include directives and will keep them at the end of the file. Does not allow to add such directives
• Adds the rendered string that is written to the file as an output

Fixes #776
Fixes #777

ISSUE TYPE

• Bugfix Pull Request
• Feature Pull Request

COMPONENT NAME

postgresql_pg_hba

ADDITIONAL INFORMATION

• Removes the old PgHba class and moves the code to different stand-alone methods
• Uses proper atomic writes
• Adds tests for several edge-cases and new features
• The only modification in the tests is to account for the changes regarding keep_comments_at_rules

[Andersson007]

@toydarian thanks for a lot of good changes! Could you please split the PR into one per changelog entry?

[toydarian]

I can try. It's actually hard, as a lot of the changes are closely tied in together and I want to avoid writing code that will be removed in the next PR.

[Andersson007]

I can try. It's actually hard, as a lot of the changes are closely tied in together and I want to avoid writing code that will be removed in the next PR.

sure, any smaller PRs would be much appreciated, thanks