[BWC] Temporarily Disable BWC Testing to remove stale joda flag in DocValueFormat

[nknize]

This issue is to track temporary disablement of BWC testing until ignore & removal of joda flag in DocValueFormat is backported. Back story, in Legacy 7.0 joda was removed in favor of java time to support nanoseconds properly. To support BWC in docvalues a boolean flag was added. As of Legacy 7.7 this flag is always false and can be removed.

[peternied]

@nknize I'm not sure how we can know if this issue is resolved or not - in the associated PR I didn't see any tests specifically being disabled. Could you add that detail so another contributor can address and then remove the untriaged label?

[nknize]

We opted against disabling bwc testing for that PR.. closing issue. Thx @peternied