keymgr2kasp: use FIPS compliant algorithms and key sizes

keymgr2kasp: use FIPS compliant algorithms and key sizes

migrate-nomatch-alglen: switched to RSASHA256 instead of RSASHA1
and the key size now changes from 2048 bits to 3072 bits instead
of 1024 bits to 2048 bits.

migrate-nomatch-algnum: switched to RSASHA256 instead of RSASHA1
as initial algorithm and adjusted mininum key size to 2048 bits.

rsasha256: adjusted minimum key size to 2048 bits.

(cherry picked from commit 048b0151665d6111bb61a98b349c510c36ed99f2)