[AMORO-3176] Support multiple format in internal catalog

[zhoujinsong]

Why are the changes needed?

Close #3176.

Brief change log

• Make InternalCatalogImpl support both Iceberg and Mixed-Iceberg tables.
• Fix some bugs in spark about using unified catalog.

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before making a pull request

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (not documented)

[zhoujinsong]

Tested with the following SQL with the internal catalog:

create database mixed;
create database iceberg;

create table mixed.tb1 (
    id int,
    name string, 
    ts timestamp,
    primary key (id)
) using mixed_iceberg 
partitioned by (days(ts));

create table iceberg.tb1 (
    id int,
    name string, 
    ts timestamp
) using iceberg 
partitioned by (days(ts));

[baiyangtx]

LGTM