[SPARK-20876][SQL] If the input parameter is float type for ceil or floor,the...

[SPARK-20876][SQL] If the input parameter is float type for ceil or floor,the result is not we expected

## What changes were proposed in this pull request?

spark-sql>SELECT ceil(cast(12345.1233 as float));
spark-sql>12345
For this case, the result we expected is `12346`
spark-sql>SELECT floor(cast(-12345.1233 as float));
spark-sql>-12345
For this case, the result we expected is `-12346`

Because in `Ceil` or `Floor`, `inputTypes` has no FloatType, so it is converted to LongType.
## How was this patch tested?

After the modification:
spark-sql>SELECT ceil(cast(12345.1233 as float));
spark-sql>12346
spark-sql>SELECT floor(cast(-12345.1233 as float));
spark-sql>-12346

Author: liuxian <liu.xian3@zte.com.cn>

Closes #18103 from 10110346/wip-lx-0525-1.