[SQL][DOCS] Improve table caching section

Author: Michael Armbrust <michael@databricks.com>

Closes #2434 from marmbrus/patch-1 and squashes the following commits:

67215be [Michael Armbrust] [SQL][DOCS] Improve table caching section

(cherry picked from commit cbf983bb4a550ff26756ed7308fb03db42cffcff)
Signed-off-by: Michael Armbrust <michael@databricks.com>
Docs: move HA subsections to a deeper indentation level

Makes the table of contents read better

Author: Andrew Ash <andrew@andrewash.com>

Closes #2402 from ash211/docs/better-indentation and squashes the following commits:

ea0e130 [Andrew Ash] Move HA subsections to a deeper indentation level

(cherry picked from commit b3830b28f8a70224d87c89d8491c514c4c191d23)
Signed-off-by: Andrew Or <andrewor14@gmail.com>
[SPARK-3564][WebUI] Display App ID on HistoryPage

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #2424 from sarutak/display-appid-on-webui and squashes the following commits:

417fe90 [Kousuke Saruta] Added "App ID column" to HistoryPage

(cherry picked from commit 6688a266f2cb84c2d43b8e4d27f710718c4cc4a0)
Signed-off-by: Andrew Or <andrewor14@gmail.com>
[SPARK-3565]Fix configuration item not consistent with document

https://issues.apache.org/jira/browse/SPARK-3565

"spark.ports.maxRetries" should be "spark.port.maxRetries". Make the configuration keys in document and code consistent.

Author: WangTaoTheTonic <barneystinson@aliyun.com>

Closes #2427 from WangTaoTheTonic/fixPortRetries and squashes the following commits:

c178813 [WangTaoTheTonic] Use blank lines trigger Jenkins
646f3fe [WangTaoTheTonic] also in SparkBuild.scala
3700dba [WangTaoTheTonic] Fix configuration item not consistent with document

(cherry picked from commit 3f169bfe3c322bf4344e13276dbbe34279b59ad0)
Signed-off-by: Patrick Wendell <pwendell@gmail.com>