Add script to download OWASP CRS v4 to run benchmark

- Simplified clone & checkout of CRS repository

Author: eduar-hte

test/benchmark/basic_rules.conf

@@ -1,5 +1,3 @@
 
 Include "../../modsecurity.conf-recommended"
 
-Include "owasp-v3/crs-setup.conf.example"
-Include "owasp-v3/rules/*.conf"

test/benchmark/download-owasp-v2-rules.sh

@@ -2,10 +2,7 @@
 #
 #
 
-git clone https://github.com/coreruleset/coreruleset.git owasp-v2
-cd owasp-v2
-git checkout 2.2.9 -b tag2.2.9
-cd -
+git clone -c advice.detachedHead=false --depth 1 --branch 2.2.9 https://github.com/coreruleset/coreruleset.git owasp-v2
 
 echo 'Include "owasp-v2/base_rules/*.conf"' >> basic_rules.conf
 echo 'Include "owasp-v2/optional_rules/*.conf"' >> basic_rules.conf

test/benchmark/download-owasp-v3-rules.sh

@@ -1,10 +1,6 @@
 #!/bin/bash
 
-
-git clone https://github.com/coreruleset/coreruleset.git owasp-v3
-cd owasp-v3
-git checkout v3.0.2 -b tag3.0.2
-cd -
+git clone -c advice.detachedHead=false --depth 1 --branch v3.0.2 https://github.com/coreruleset/coreruleset.git owasp-v3
 
 echo 'Include "owasp-v3/crs-setup.conf.example"' >> basic_rules.conf
 echo 'Include "owasp-v3/rules/*.conf"' >> basic_rules.conf

test/benchmark/download-owasp-v4-rules.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+git clone -c advice.detachedHead=false --depth 1 --branch v4.3.0 https://github.com/coreruleset/coreruleset.git owasp-v4
+
+echo 'Include "owasp-v4/crs-setup.conf.example"' >> basic_rules.conf
+echo 'Include "owasp-v4/rules/*.conf"' >> basic_rules.conf
+
+echo "Done."
+