for floating point types

Report a deprecation warning if FLOAT(M,D), DOUBLE(M,D)
or REAL(M,D) are used.  M specifies the number of
digits in total and D specifies the number of digits after
the decimal point.

This includes reporting warnings for CREATE TABLE ... LIKE
and CREATE TABLE ... SELECT which causes such columns to
be made.

Change-Id: Id7816995959a8503af4c2fdceaeb9e7f4b1c7f7b