naming convention for access method + input type names

[hilmarf]

Description

Access methods, input types, upload- and download handlers should be aligned from a naming perspective.

Done Criteria

• Result matches final proposal: https://github.com/open-component-model/internal-processes/pull/13
• Code has been reviewed by other team members
• Internal technical Documentation created/updated
• New / changed code is documented
• Analysis of existing tests (Unit and Integration)
• Unit Tests created for new code or existing Unit Tests updated
• Integration Test Suite updated (includes deletion of existing unnecessary Integration Test and/or creation of new ones if required)
• Enduser Documentation updated (if applicable)
• Successful demonstration in Review