RFR: 8338536: Permanently disable remote code downloading in JNDI

[Aleksei Efimov]

This PR permanently disable remote code downloading in JNDI/LDAP and JNDI/RMI JDK providers, and contains the following changes:
- The following two properties are removed:
    - `com.sun.jndi.ldap.object.trustURLCodebase`
    - `com.sun.jndi.rmi.object.trustURLCodebase`
- JNDIs object factories logic has been altered to make it possible to reconstruct object factories from remote locations when a custom [ObjectFactoryBuilder](https://docs.oracle.com/en/java/javase/23/docs/api/java.naming/javax/naming/spi/ObjectFactoryBuilder.html) is assigned via the [NamingManager#setObjectFactoryBuilder](https://docs.oracle.com/en/java/javase/23/docs/api/java.naming/javax/naming/spi/NamingManager.html#setObjectFactoryBuilder(javax.naming.spi.ObjectFactoryBuilder)) API.
- The `NamingManager` class-level documentation is edited to remove references to the `SecurityManager`. It was also revised to clarify a reconstruction mechanism of object factories from remote references in the presence of a custom `ObjectFactoriesBuilder`.
- Also, the modified classes have been cleaned-up from `SecurityManager`, `doPrivildged`, and `AccessController` usages.

These changes require a CSR that will be submitted soon.

### Testing
- Added a new test to check if NamingManager#setObjectFactoryBuilder can be used to implement remote code downloading: `test/jdk/com/sun/jndi/rmi/registry/objects/ObjectFactoryBuilderCodebaseTest.java`
- `jdk-tier1` to `jdk-tier3` and other JNDI LDAP/RMI tests show no issue with the proposed changes.

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Commit messages:
 - 8338536: Permanently disable remote code downloading in JNDI

Changes: https://git.openjdk.org/jdk/pull/22154/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22154&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338536
  Stats: 544 lines in 11 files changed: 300 ins; 187 del; 57 mod
  Patch: https://git.openjdk.org/jdk/pull/22154.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22154/head:pull/22154

PR: https://git.openjdk.org/jdk/pull/22154