feat: Adapt client and integration tests to a KinD based CAPI

[ZPascal]

This is what it took to get the integration tests running against a CAPI deployed on KinD. It also bumps the supported CAPI version, which fixes #1370.

Client changes:

• SUPPORTED_API_VERSION goes from 2.272.0 to 2.290.0. SUPPORTED_API_VERSION_V3 is already gone on main, so I didn't bring it back.
• The v3 Space gets the suspended field.
• v3 package bits uploads now always send a resources part, even an empty one. CAPI rejects the upload otherwise with CF-AppBitsUploadInvalid.
• v2 app uploads without resources now also pass resources=[] as a query parameter. The nginx upload module can drop the form field, and the request then fails with "missing :resources". Only an empty list fits into a URL, so that is the only case covered.
• The LDAP and SAML identity provider configurations get caCertificates.
• The UAA authorization calls now send an Accept: application/x-www-form-urlencoded header and drop the authorization header where it doesn't belong (the earlier Fix UAA Authorizations accept headers #1379 commit is part of this branch). The openid-configuration lookup also no longer sends the authorization header.
• Small one in pom.xml: the Reactor Javadoc link now points to javadoc.io, since the old one no longer resolves.

Integration tests:

• At startup, the tests now reserve the TCP ports that NameFactory hands out on the default-tcp router group. The TCP route tests then no longer depend on test order or on the default port range of the deployment. This is skipped together with the other TCP routing tests (SKIP_TCP_ROUTING_TESTS). The new bean uses its own routing client, because the shared one depends on the cleaner, which in turn depends on this bean.

Testing

• I added unit tests for the two upload changes in ReactorPackagesTest and ReactorApplicationsV2Test.
• The integration tests were made functional as part of this feat: Add integration test workflow running on KinD #1381 using a current CAPI release and tested here (main branch)

Connected PR

• feat: Add integration test workflow for multiple Java versions #1385