Add AutoStyle key to dependency verification keyring

[sakshichitnis27]

Summary

• Add the AutoStyle 4.0.1 release key to Gradle's checked-in dependency verification keyring.
• Keep signature verification enabled while allowing builds to verify AutoStyle artifacts without reaching an external key server.

Background

JMeter's verification metadata already trusts AutoStyle fingerprint
6FF955169D698CC09BA7403AC99BFE8CD562EAC1, but the corresponding public key
was not present in gradle/verification-keyring.keys.

When the configured public key servers are unavailable, Gradle cannot verify the
AutoStyle 4.0.1 metadata used by the build logic. This stops the build during
:build-logic:build-parameters:compileJava before JMeter itself can be compiled.

This change adds only that public key to the local keyring. It does not disable
dependency verification, ignore the signing key, change a dependency version, or
add a checksum exception.

Verification

• Reproduced the failure with external key servers disabled: the same five
  AutoStyle 4.0.1 artifacts failed verification.
• Verified all eight downloaded AutoStyle 4.0.1 signatures independently against
  fingerprint 6FF955169D698CC09BA7403AC99BFE8CD562EAC1.
• Repeated the restricted-key-server build after adding the key; the build
  configuration completed successfully.
• Ran ./gradlew --quiet check -PjdkTestVersion=21.
• Ran ./gradlew --quiet :src:dist:assemble -PjdkTestVersion=21.
• Verified the generated binary ZIP with unzip -t.

Refs #6713