Use CAP Java 4.0.2, cds-dk ^9 and cds-mtxs ^3

[mofterdinger]

This PR updates the Bookshop to new major versions of several CAP components:

• CAP Java 4.0.2
• @sap/cds-dk ^9
• @sap/cds ^9
• @sap/cds-compiler ^6
• @sap/cds-mtxs ^3

It also adopts new default values ​​for configuration parameters and removes outdated settings:

• removed from .cdsrc.json:
  • sql.native_hana_associations: false -> new default in cds ^9
  • cdsc.newParser: true -> new default in cdsc ^6
• removed from mtx/sidecar/package.json:

   "[development]": {
      "requires": { "auth": "dummy" }
    }
  

[beckermarc]

Let's update consistently to cds9 CAP Java 4 in a single PR. And let's also make sure we remove properties that are now set to the default.

[mofterdinger]

Let's update consistently to cds9 CAP Java 4 in a single PR. And let's also make sure we remove properties that are now set to the default.

yes, this PR is not finished yet ;-)

[beckermarc]

Ah sorry, I always get notifications for all PRs created in this repository. I thought you already added me as reviewer ;)

[beckermarc]

Just as a hint: You can also take changes in #484 into account and merge that into this one.

[beckermarc]

I think we should also check the application.yaml. There are likely some properties, which are no longer required, as they are defaults now.

[mofterdinger]

I think we should also check the application.yaml. There are likely some properties, which are no longer required, as they are defaults now.

I did a look into the application.yaml and in our migration guide 3 -> 4 and it looks like, no changes are required in application.yaml

[mofterdinger]

ah, I searched for defaultTranslations and not default-translations. I hate these different formats for the spring properties.