PIPE-2922: Bump MIN_CASA_REVISION to 6.7.4.2 and add discouraged version range
Add DISCOURAGED_CASA_REVISION_RANGE ([6.7.5.0, 6.7.6.0]) to warn when the
running CASA version is known to have issues (casatasks.getjyperkalma not
implemented; see PIPE-2967/CAS-14704). Unlike the hard min/max checks, this
emits a warning rather than a critical log and does not block execution.
Also convert the existing LOG.critical() calls to lazy %-formatting.
