[GOBBLIN-2238]Remove unsupported ChaCha20 cipher suites from default SSL configuration

[pratapaditya04]

Dear Gobblin maintainers,

Please accept this PR. I understand that it will not be reviewed until I have checked off all the steps below!

JIRA

• My PR addresses the following Gobblin JIRA issues and references them in the PR title. For example, "[GOBBLIN-XXX] My Gobblin PR"
  https://issues.apache.org/jira/browse/GOBBLIN-2238

Description

• Here are some details about my PR, including screenshots (if applicable):

Details :

This PR removes the TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 and
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 cipher suites from Gobblin’s default gRPC SSL configuration.

These cipher suites are not supported on Java 8 (1.8.0_282 and below), and their presence was causing:
java.lang.IllegalArgumentException: Unsupported CipherSuite: TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
when Gobblin Temporal master or Yarn containers attempted to initialize SSL/TLS contexts during job startup.

Affected flows used Java 8u282 (java.home=/export/apps/jdk/JDK-1_8_0_282-msft/jre)
Successful flows used Java 8u172 (java.home=/export/apps/jdk/JDK-1_8_0_172/jre)
The issue surfaced because newer JDK 8 builds perform stricter cipher validation than older ones.
Fix:
Removed ChaCha20-based ciphers from the default SSL_CONFIG_DEFAULT_CIPHER_SUITES.
Retained AES-GCM-based ciphers required for HTTP/2 and supported on all JDK 8+ versions:
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
.

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:

Commits

• My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"