RFR: 8344299: SM cleanup in javax.naming modules

[Aleksei Efimov]

The proposed change cleans-up `SecurityManager`, `doPriviledged`, and `AccessController` usages from `java.naming`, `jdk.naming.rmi` and `jdk.naming.dns` modules.

One noteworthy change: The `java.naming.rmi.security.manager` JNDI environment property can be used to setup the `SecurityManager`: if the property is added to an environment map the `RegistryContext` attempts to setup the `SecurityManager`. The environment property and related method are removed in this PR. 

`tier1` - `tier3`, and other non-tiered JNDI tests showed no failures related to this change.

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Commit messages:
 - 8344299: SM cleanup in javax.naming modules

Changes: https://git.openjdk.org/jdk/pull/22421/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22421&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344299
  Stats: 293 lines in 18 files changed: 0 ins; 231 del; 62 mod
  Patch: https://git.openjdk.org/jdk/pull/22421.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22421/head:pull/22421

PR: https://git.openjdk.org/jdk/pull/22421