Make `required` usage consistent in l3 resample metadata

[braingram]

The l3 resample metadata currently requires some metadata and not others
https://github.com/spacetelescope/rad/blob/85c36a9c6d01fe1b93c8da75ea4f7f3137ba7fc9/latest/meta/l3_resample.yaml#L73-L74

We should either:

• remove all requirements and write romancal tests to confirm the metadata is recorded
• make all metadata required to allow validation to check that the metadata is recorded

[braingram]

@stscijgbot-rstdms

[braingram]

From discussion during the romancal tag-up the workable solution is:

• add tests to romancal to check the non-required items are populated by romancal
• make no change to schemas

[braingram]

@PaulHuwe did you already make an RCAL ticket for this?

[PaulHuwe]

Yes, but hadn't sorted out regression test file issues. I closed that.

[braingram]

@stscijgbot-rstdms

[stscijgbot-rstdms]

This issue is tracked on JIRA as RAD-251.

[stscijgbot-rstdms]

Comment by Paul Huwe on JIRA:

This is implemented in RAD PR-849: #849

[stscijgbot-rstdms]

Comment by Paul Huwe on JIRA:

Roman team decided to go a different route, so closing this.