Fix exception handling in compiler

[bentsherman]

The compiler currently catches all CompilationFailedExceptions and ignores them:

https://github.com/nextflow-io/nextflow/blob/0f588576e193f4df81dcf7ffd7e0412f89540636/modules/nf-lang/src/main/java/nextflow/script/control/Compiler.java#L73-L82

This is so that parsing errors don't crash the language server. However, if an exception occurs for some other reason, like a bug, it is also ignored, and typically leads to the AST not being built and no errors reported.

The problem is that some legitimate parsing errors are being collected by the error collector and still being thrown. If I can remove that unnecessary throw, I should be able to remove these no-op catch clauses.