[WIP][SPARK-42291] Enable dropping of columns for non V2 tables

[yeachan153]

Add support to drop columns in non V2 tables.

Does this PR introduce any user-facing change?

No

How was this patch tested?

Built the jars in 3.2.0 and dropped columns using alter table:

ALTER TABLE lake.foo DROP COLUMNS (`a`, `b`);
ALTER TABLE lake.foo DROP COLUMNS (`a`)
ALTER TABLE lake.foo DROP COLUMN `a`

Tested on Spark 3.2.0 with an external hive metastore; the underlying data is in parquet format in cloud storage. Also affects the latest version.

[github-actions]

We're closing this PR because it hasn't been updated in a while. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you'd like to revive this PR, please reopen it and ask a committer to remove the Stale tag!