Senden von bereits verschlüsselten Anträgen inkl. Abruf von PK

• introduce strategies for sending normal submissions and submissions where data is already encrypted
• move logic out of client builder
• change order of fluent calls to cover common cases (destinationId, serviceType) between the strategies as last steps

.reuse/dep5

+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+
+Files: api/src/* client/src/* core/src/* open-api/src/*
+       api/README.md client/README.md core/README.md open-api/README.md
+       README.md CHANGELOG.md
+Copyright: 2022 FIT-Connect contributors
+License: EUPL-1.2
+
+Files: .mvn/wrapper/* mvnw mvnw.cmd
+Copyright: 2013-2022 The Apache Software Foundation
+License: Apache-2.0
+
+Files: pom.xml api/pom.xml core/pom.xml client/pom.xml open-api/pom.xml
+       .gitlab-ci.yml .gitignore
+       renovate.json checkstyle.xml config.yml
+Copyright: 2022 FIT-Connect contributors
+License: CC0-1.0