RFR: 8338536: Permanently disable remote code downloading in JNDI [v2]

[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.

Aleksei Efimov has updated the pull request incrementally with one additional commit since the last revision:

  Implement Daniel suggestions, add missing new lines to test files

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/22154/files
  - new: https://git.openjdk.org/jdk/pull/22154/files/6784ea1b..7b3edb84

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22154&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22154&range=00-01

  Stats: 23 lines in 5 files changed: 0 ins; 10 del; 13 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