[csrng/dv] Add csrng_sts_cg to testplan and distributed csrng_internal_cg to other groups
[csrng/dv] Add csrng_sts_cg to testplan and distributed csrng_internal_cg to other groups

Signed-off-by: Marno van der Maas <140765e35f75d33bd28eb112371bcce78847cb8a@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan