[FLINK-29952][table-api]Append the detail of the exception when drop tamporary table.

[houhang1005]

Append the detail of the exception when drop tamporary table.

Signed-off-by: houhang houhang@asiainfo.com

What is the purpose of the change

Make the exception more clear when failed to drop a temporary table in sql-client.

Brief change log

• Append a reason for the failure about dropping a temporary to current ValidationException.

Verifying this change

This change added tests and can be verified as follows:

• Project can build successfully.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: (no)

Documentation

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

[flinkbot]

CI report:

• f9904ca Azure: SUCCESS

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[houhang1005]

@fsk119 Hi! This is my first time to deal with a Flink PR, I don't know whether I missed any procedure. Please give me a little tip when you get free time -.-