"Certificate request" - Revisit usage

[clintwilson]

During review of the BRs by the Validation Subcommittee at F2F 57, focused on identifying areas where the CA issuing certificates to itself may require clarification, Section 4.1.2 caused some fair amount of discussion on an unrelated topic.

4.1.2 sets forth requirements for receiving and processing certificate requests. There is ambiguity in what this encompasses (e.g. is a CSR in itself a compliant certificate request?) and questions as to the relevance of this section today, compared to when it was first written.

Rough consensus was achieved during this discussion that the Validation Subcommittee should:

1. Update from using "certificate request" to a defined term, such as "Certificate Application"; and
2. Revise usage of "certificate request" -> "Certificate Application" to ensure clarity and relevance of associated requirements.

[CBonnell]

It was agreed on 2023-08-24 call to revisit this. Some concerns with current wording include:

1. Whether a CSR is needed
2. Whether any changes to this usage will affect validation requirements