[SPARK-19724][SQL][FOLLOW-UP]Check location of managed table when ignoreIfExists is true

[gengliangwang]

What changes were proposed in this pull request?

In the PR #20886, I mistakenly check the table location only when ignoreIfExists is false, which was following the original deprecated PR.
That was wrong. When ignoreIfExists is true and the target table doesn't exist, we should also check the table location. In other word, ignoreIfExists has nothing to do with table location validation.
This is a follow-up PR to fix the mistake.

How was this patch tested?

Add one unit test.

[gengliangwang]

@cloud-fan@gatorsmile

[SparkQA]

Test build #89011 has finished for PR 21001 at commit 3d1c909.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[gengliangwang]

retest this please.

[SparkQA]

Test build #89017 has finished for PR 21001 at commit 3d1c909.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #89050 has finished for PR 21001 at commit 3fe648f.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[gengliangwang]

The error message is

"Table or view 'tbl' already exists in database 'default';"

This is soft of behavior change, as we check table existence first.

[gatorsmile]

Instead of deleting the test, we should change the name of the table

[gengliangwang]

We check table existence in SessionCatalog instead of ExternalCatalog now.
SessionCatalogSuite has similar test case, so no need to create new one.

[SparkQA]

Test build #89072 has finished for PR 21001 at commit 1e27cc8.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #89071 has finished for PR 21001 at commit 577a399.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #89080 has finished for PR 21001 at commit 3f3391b.

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

[cloud-fan]

We should not remove this logic here, even it's also done in SessionCatalog

[SparkQA]

Test build #89115 has finished for PR 21001 at commit ffd0c66.

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

[gatorsmile]

LGTM

Thanks! Merged to master.

[SparkQA]

Test build #89124 has finished for PR 21001 at commit c4f359a.

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