Upgrade Spotless to 0.43.0 & Scala 2.12.19

[asfimport]

Currently building off of master is broken because of:

[ERROR] Failed to execute goal com.diffplug.spotless:spotless-maven-plugin:2.30.0:check (default) on project parquet-format-structures: Execution default of goal com.diffplug.spotless:spotless-maven-plugin:2.30.0:check failed: java.lang.reflect.InvocationTargetException: 'com.sun.tools.javac.tree.JCTree com.sun.tools.javac.tree.JCTree$JCImport.getQualifiedIdentifier()' -> [Help 1]

Arrow hit the same issue: apache/datafusion-comet#85 because of this: diffplug/spotless#1774 Bumping spotless to fix building on master.

Reporter: Vinoo Ganesh / @vinooganesh
Assignee: Vinoo Ganesh / @vinooganesh

PRs and other links:

• GitHub Pull Request #1287

_{Note: This issue was originally created as PARQUET-2441. Please see the migration documentation for further details.}

[asfimport]

Vinoo Ganesh / @vinooganesh:
We're also hitting this on master: https://github.com/scala/bug/issues/12783. Fixing will require an upgrade to scala 2.12.19.