[SPARK-34465][SQL] Rename v2 alter table exec nodes

[MaxGekk]

What changes were proposed in this pull request?

Rename the following v2 exec nodes:

• AlterTableAddPartitionExec -> AddPartitionExec
• AlterTableRenamePartitionExec -> RenamePartitionExec
• AlterTableDropPartitionExec -> DropPartitionExec

Why are the changes needed?

• To be consistent with v2 exec node added before: ALTER TABLE .. RENAME TO` -> RenameTableExec.
• For simplicity and readability of the execution plans.

Does this PR introduce any user-facing change?

Should not since this is internal API.

How was this patch tested?

By running the existing test suites:

$ build/sbt -Phive-2.3 -Phive-thriftserver "test:testOnly *AlterTableAddPartitionSuite"
$ build/sbt -Phive-2.3 -Phive-thriftserver "test:testOnly *AlterTableDropPartitionSuite"
$ build/sbt -Phive-2.3 -Phive-thriftserver "test:testOnly *AlterTableRenamePartitionSuite"

[SparkQA]

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/39818/

[SparkQA]

Kubernetes integration test status failure
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/39818/

[SparkQA]

Test build #135238 has finished for PR 31584 at commit dabc422.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

+1, LGTM. Merged to master.

[cloud-fan]

Shall we rename the logical plan as well? The logical plan for REAME is RenameTable as well.

[MaxGekk]

Here is the PR #31596 @cloud-fan @imback82 @dongjoon-hyun Could you take a look at it.