Fix poetry migration so that maintainers and authors are under the correct section and in the correct format

[aaron-gary]

In the previous ticket #437 we discovered that there is one more format we need to account for in the pyproject.toml [tool.poetry] to [project] migration. Since we didn't have that scenario covered we removed the "authors" and "maintainers" from the migration. We need to finish the baton migration so that we can re-incorporate the remaining items for migration.

Steps to reproduce:

1. run mvn clean install -P bootstrap
2. Check the habushu-maven-plugin/target/test-classes/migration/poetry-v2/with-fields-in-tool-poetry.toml file and observe where authors and maintainers are located

Expected result:

• Build passes without failure
• The authors and maintainers are under [project] and are in the format `[{name = "Some Name", email = "someone@example.con"}]

Actual result:
maintainers and authors are under [tool.poetry] and are not in the correct format

Note: blank lines are important (make sure there is a blank line preceding the added code)

DoD:

• Update the scenario with according to the steps to reproduce
• the maven build passes

Test Steps:

1. Pull latest changes
2. Run the build

   mvn clean install -P bootstrap

3. Verify the build succeeds