chore(codegen): fix codegen release (#5994)

Jreleaser has to work in a git repository, and uses the jgit java
library to interact with git. When jgit tries to open the git repo,
it tries to open `codegen/config` as a file, which blows up. I don't
know of any way to configure what jgit is doing here, so I renamed
the directory and it solves the issue. Also had to set `gitRootSearch`
so jreleaser walks up the parent directories to find the git root.

codegen/build.gradle.kts

@@ -183,6 +183,9 @@ subprojects {
          * ====================================================
          */
         apply(plugin = "checkstyle")
+        checkstyle {
+            configFile = File("${project.rootDir}/gradleConfig/checkstyle/checkstyle.xml")
+        }
 
         tasks["checkstyleTest"].enabled = false
 
@@ -237,7 +240,7 @@ subprojects {
         // Configure the bug filter for spotbugs.
         spotbugs {
             setEffort("max")
-            val excludeFile = File("${project.rootDir}/config/spotbugs/filter.xml")
+            val excludeFile = File("${project.rootDir}/gradleConfig/spotbugs/filter.xml")
             if (excludeFile.exists()) {
                 excludeFilter.set(excludeFile)
             }
@@ -250,6 +253,7 @@ subprojects {
  */
 jreleaser {
     dryrun = false
+    gitRootSearch = true
 
     // Used for creating a tagged release, uploading files and generating changelog.
     // In the future we can set this up to push release tags to GitHub, but for now it's