Small changes in docs (#512)

## Which issue does this PR close?
Closes #503
Closes #191 

## Rationale for this change

1. Provide a way to build Comet from the source on an isolated environments with an access to github.com
2. Update documentation in part, related to compatibility of Spark AQE and Comet Shuffle

## What changes are included in this PR?

- Update tuning section about the compatibility of Shuffle and Spark AQE
- Add `release-nogit` for building on an isolated environments
- Update docs in the section about an installation process


 Changes to be committed:
	modified:   Makefile
	modified:   docs/source/user-guide/installation.md
	modified:   docs/source/user-guide/tuning.md

## How are these changes tested?

I run both `make release` and `make release-nogit`. The first one created properties file in `common/target/classes` but the second did not. The flag `-Dmaven.gitcommitid.skip=true` is described in [this comment](git-commit-id/git-commit-id-maven-plugin#392 (comment)).

Makefile

@@ -77,6 +77,9 @@ release-linux: clean
 release:
 	cd core && RUSTFLAGS="-Ctarget-cpu=native" cargo build --release
 	./mvnw install -Prelease -DskipTests $(PROFILES)
+release-nogit:
+	cd core && RUSTFLAGS="-Ctarget-cpu=native" cargo build --features nightly --release
+	./mvnw install -Prelease -DskipTests $(PROFILES) -Dmaven.gitcommitid.skip=true
 benchmark-%: clean release
 	cd spark && COMET_CONF_DIR=$(shell pwd)/conf MAVEN_OPTS='-Xmx20g' ../mvnw exec:java -Dexec.mainClass="$*" -Dexec.classpathScope="test" -Dexec.cleanupDaemonThreads="false" -Dexec.args="$(filter-out $@,$(MAKECMDGOALS))" $(PROFILES)
 .DEFAULT:

docs/source/user-guide/installation.md

@@ -57,6 +57,12 @@ Note that the project builds for Scala 2.12 by default but can be built for Scal
 make release PROFILES="-Pspark-3.4 -Pscala-2.13"
 ```
 
+To build Comet from the source distribution on an isolated environment without an access to `github.com` it is necessary to disable `git-commit-id-maven-plugin`, otherwise you will face errors that there is no access to the git during the build process. In that case you may use:
+
+```console
+make release-nogit PROFILES="-Pspark-3.4"
+```
+
 ## Run Spark Shell with Comet enabled
 
 Make sure `SPARK_HOME` points to the same Spark version as Comet was built for.

docs/source/user-guide/tuning.md

@@ -39,6 +39,8 @@ It must be set before the Spark context is created. You can enable or disable Co
 at runtime by setting `spark.comet.exec.shuffle.enabled` to `true` or `false`.
 Once it is disabled, Comet will fallback to the default Spark shuffle manager.
 
+> **_NOTE:_** At the moment Comet Shuffle is not compatible with Spark AQE partition coalesce. To disable set `spark.sql.adaptive.coalescePartitions.enabled` to `false`.
+
 ### Shuffle Mode
 
 Comet provides three shuffle modes: Columnar Shuffle, Native Shuffle and Auto Mode.