bump snakeyaml to 1.33 in logstash-core

[jsvd]

ensure logstash-core picks up 1.33 as well from jackson-dataformat-yaml's transititive dependency

Since the current version of jackson-dataformat-yaml has its own dependency of snakeyaml 1.30, logstash-core will have 1.30 instead of 1.33 unless it's overriden in logstash-core/build.gradle's dependency section

[kaisecheng]

LGTM

[jsvd]

for reference:

~/elastic/logstash ❯ git co v8.6.1
Note: switching to 'v8.6.1'.
HEAD is now at 6a248b509 Update snakeyaml to 1.33 (#14848)

~/elastic/logstash tags/v8.6.1* ❯ ./gradlew clean assemble
BUILD SUCCESSFUL in 18s
46 actionable tasks: 42 executed, 4 up-to-date

~/elastic/logstash tags/v8.6.1* ❯ find . -name "*snakeyaml*jar"
./logstash-core/lib/jars/snakeyaml-1.30.jar
./vendor/jruby/lib/ruby/stdlib/org/yaml/snakeyaml/1.31/snakeyaml-1.31.jar

~/elastic/logstash tags/v8.6.1 ❯ git co -                              
Previous HEAD position was 6a248b509 Update snakeyaml to 1.33 (#14848)
Switched to branch 'bump_snakeyaml_1_33'

~/elastic/logstash bump_snakeyaml_1_33* ❯ ./gradlew clean assemble     

BUILD SUCCESSFUL in 13s
46 actionable tasks: 42 executed, 4 up-to-date

~/elastic/logstash bump_snakeyaml_1_33* ❯ find . -name "*snakeyaml*jar"
./logstash-core/lib/jars/snakeyaml-1.33.jar
./vendor/jruby/lib/ruby/stdlib/org/yaml/snakeyaml/1.33/snakeyaml-1.33.jar

[jsvd]

@logstashmachine backport 8.7

[jsvd]

@logstashmachine backport 8.6

[kaisecheng]

@logstashmachine backport 7.17