[smallrye-config-jasypt] Introduce new optional property to manage IvGenerator for jasypt secret key handler

[alex-kovalenko1982]

smallrye-config/utils/jasypt/src/main/java/io/smallrye/config/jasypt/JasyptSecretKeysHandler.java

Line 16 in b39e112

encryptor.setIvGenerator(new RandomIvGenerator());

At the moment, jasypt encryptor is fixed to new RandomIvGenerator().
Would be great to have an option to choose IvGenerator class when creating the encryptor.
At least among RandomIvGenerator (default) and NoIvGenerator (optionally changed in the config).

Suggestion for a new property: smallrye.config.secret-handler.jasypt.iv-generator.enabled
Default value: true

When nothing is set then the legacy behavior is in action:
encryptor.setIvGenerator(new RandomIvGenerator());
and in case when new property set to false then the line above replaced with:
encryptor.setIvGenerator(new NoIvGenerator());

[radcortez]

We can certainly consider adding such support.

Alternatively, it should be easy to provide your own secret key handler with the desired settings:
https://smallrye.io/smallrye-config/3.9.1/config/secret-keys/