Bump configuration-as-code.version from 1.35 to 1.51

Bumps `configuration-as-code.version` from 1.35 to 1.51.

Updates `configuration-as-code` from 1.35 to 1.51
- [Release notes](https://github.com/jenkinsci/configuration-as-code-plugin/releases)
- [Commits](jenkinsci/configuration-as-code-plugin@configuration-as-code-1.35...configuration-as-code-1.51)

Updates `test-harness` from 1.35 to 1.51
- [Release notes](https://github.com/jenkinsci/configuration-as-code-plugin/releases)
- [Commits](jenkinsci/configuration-as-code-plugin@configuration-as-code-1.35...configuration-as-code-1.51)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -29,7 +29,7 @@
         <changelist>-SNAPSHOT</changelist>
         <jenkins.version>2.164.1</jenkins.version>
         <java.level>8</java.level>
-        <configuration-as-code.version>1.35</configuration-as-code.version>
+        <configuration-as-code.version>1.51</configuration-as-code.version>
     </properties>
 
     <repositories>