[ELY-2518] Move KeyStoreUtil to a new wildfly-elytron-keystore-util module

[mskacelik]

/cc @darranl @fjuma
issue: https://issues.redhat.com/browse/ELY-2518
Pretty much done what was asked for from the issue's description.

I have a few points I’d like to double-check regarding the current implementation:

1.) ElytronMessages & ID Conflict: Should I generate a unique message ID for this, or should I continue replicating 2035? The current approach causes a conflict in ELY_Messages.txt due to a module name mismatch.

2.) util Module Structure & Parent POM: I’ve placed the new sub-module within wildfly-elytron-keystore, but I kept its parent as wildfly-elytron-parent. Does it make more sense for it to inherit from the keystore module instead?

3.) Dependency Logic: I haven't added a dependency from wildfly-elytron-keystore to the new wildfly-elytron-keystore-util. Since the Util class isn't actually called within the keystore module itself--including the deprecated sections--it seems this class is intended for end-user utility rather than internal API logic. Is that correct?

---

$ mvn dependency:tree --file keystore/util/pom.xml

[INFO] --- dependency:3.8.1:tree (default-cli) @ wildfly-elytron-keystore-util ---
[INFO] org.wildfly.security:wildfly-elytron-keystore-util:jar:2.8.3.CR1-SNAPSHOT
[INFO] +- org.wildfly.security:wildfly-elytron-provider-util:jar:2.8.3.CR1-SNAPSHOT:compile
[INFO] +- org.wildfly.security:wildfly-elytron-x500-cert:jar:2.8.3.CR1-SNAPSHOT:compile
[INFO] |  \- org.wildfly.security:wildfly-elytron-x500-cert-util:jar:2.8.3.CR1-SNAPSHOT:compile
[INFO] +- org.wildfly.common:wildfly-common:jar:2.0.1:compile
[INFO] |  +- io.smallrye.common:smallrye-common-cpu:jar:2.4.0:compile
[INFO] |  +- io.smallrye.common:smallrye-common-expression:jar:2.4.0:compile
[INFO] |  |  \- io.smallrye.common:smallrye-common-function:jar:2.4.0:compile
[INFO] |  +- io.smallrye.common:smallrye-common-net:jar:2.4.0:compile
[INFO] |  |  \- io.smallrye.common:smallrye-common-constraint:jar:2.4.0:compile
[INFO] |  +- io.smallrye.common:smallrye-common-os:jar:2.4.0:compile
[INFO] |  \- io.smallrye.common:smallrye-common-ref:jar:2.4.0:compile
[INFO] +- org.jboss.logging:jboss-logging-annotations:jar:3.0.1.Final:provided
[INFO] +- org.jboss.logging:jboss-logging:jar:3.6.1.Final:provided
[INFO] +- org.wildfly.security:wildfly-elytron-base:jar:2.8.3.CR1-SNAPSHOT:test
[INFO] +- org.wildfly.security:wildfly-elytron-asn1:jar:2.8.3.CR1-SNAPSHOT:test
[INFO] +- org.wildfly.security:wildfly-elytron-x500:jar:2.8.3.CR1-SNAPSHOT:test
[INFO] +- commons-io:commons-io:jar:2.16.1:test
[INFO] +- org.bouncycastle:bcmail-jdk15on:jar:1.67:test
[INFO] |  +- org.bouncycastle:bcprov-jdk15on:jar:1.67:test
[INFO] |  \- org.bouncycastle:bcpkix-jdk15on:jar:1.67:test
[INFO] \- junit:junit:jar:4.13.1:test
[INFO]    \- org.hamcrest:hamcrest-core:jar:1.3:test